#
# **Severity**
High
# **Vendor**
Canonical Ubuntu
# **Versions Affected**
* Ubuntu 14.04 LTS
# **Description**
Alexander Popov discovered that the N_HDLC line discipline implementation in the Linux kernel contained a double-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly gain administrative privileges.
# **Mitigation**
OSS users are strongly encouraged to follow one of the mitigations below:
The Cloud Foundry team recommends upgrading to the following BOSH stemcells:
* Upgrade 3151.x versions to 3151.12
* Upgrade 3233.x versions to 3233.15
* Upgrade 3263.x versions to 3263.21
* Upgrade 3312.x versions to 3312.21
* Upgrade 3363.x versions to 3363.10
# **References**
* [https://www.ubuntu.com/usn/usn-3220-2/](<https://www.ubuntu.com/usn/usn-3220-2/>)
* [http://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-2636.html](<http://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-2636.html>)
{"thn": [{"lastseen": "2018-01-27T09:17:15", "description": "[](<https://4.bp.blogspot.com/-cNY4GF7b-4k/WMq0sCwyxvI/AAAAAAAAr0g/zJMbacrkhsw-FQoVkI9bUZgXa-pB-QrWACLcB/s1600/linux-kernel-double-free-vulnerability.png>)\n\nAnother dangerous vulnerability has been discovered in Linux kernel that dates back to 2009 and affects a large number of Linux distros, including Red Hat, Debian, Fedora, OpenSUSE, and Ubuntu. \n \nThe latest Linux kernel flaw ([CVE-2017-2636](<http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2636>)), which existed in the Linux kernel for the past seven years, allows a local unprivileged user to gain root privileges on affected systems or cause a denial of service (system crash). \n \nPositive Technologies researcher Alexander Popov discovered a race condition issue in the N_HLDC Linux kernel driver \u2013 which is responsible for dealing with High-Level Data Link Control (HDLC) data \u2013 that leads to double-free vulnerability. \n \n\u201c**Double Free**\u201d is one of the most common memory corruption bug that occurs when the application releases same memory location twice by calling the free() function on the same allocated memory. \n \nAn unauthenticated attacker may leverage this vulnerability to inject and execute arbitrary code in the security context of currently logged in user. \n \nThe vulnerability affects the majority of popular Linux distributions including [Red Hat Enterprise Linux 6, 7](<https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2636>), [Fedora](<https://bugzilla.redhat.com/show_bug.cgi?id=1430049>), [SUSE](<https://bugzilla.novell.com/show_bug.cgi?id=CVE-2017-2636>), [Debian](<https://security-tracker.debian.org/tracker/CVE-2017-2636>), and [Ubuntu](<https://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-2636.html>). \n \nSince the flaw dates back to June 2009, Linux enterprise servers and devices have been vulnerable for a long time, but according to Positive Technologies, it is hard to say whether this vulnerability has actively been exploited in the wild or not. \n\n\n> \"The vulnerability is old, so it is widespread across Linux workstations and servers,\" [says](<https://www.ptsecurity.com/ww-en/about/news/199636/>) Popov. \"To automatically load the flawed module, an attacker needs only unprivileged user rights. Additionally, the exploit doesn't require any special hardware.\"\n\nThe researcher detected the vulnerability during system calls testing with the syzkaller fuzzer, which is a security code auditing software developed by Google. \n \nPopov then reported the flaw to kernel.org on February 28, 2017, along with the exploit prototype, as well as provided the patch to fix the issue. \n \nThe vulnerability has already been patched in the Linux kernel, and the security updates along with the vulnerability details were [published](<http://seclists.org/oss-sec/2017/q1/569>) on March 7. \n \nSo, users are encouraged to install the latest security updates as soon as possible, but if unable to apply the patch, the researcher advised blocking the flawed module (n_hdlc) manually to safeguard enterprise as well as home use of the operating system.\n", "cvss3": {}, "published": "2017-03-16T04:54:00", "type": "thn", "title": "Linux Kernel Gets Patch For Years-Old Serious Vulnerability", "bulletinFamily": "info", "cvss2": {}, "cvelist": ["CVE-2017-2636"], "modified": "2017-03-16T15:54:33", "id": "THN:FA88848EF7446185D7481A0AB338ACA7", "href": "https://thehackernews.com/2017/03/linux-kernel-vulnerability.html", "cvss": {"score": 7.2, "vector": "AV:LOCAL/AC:LOW/Au:NONE/C:COMPLETE/I:COMPLETE/A:COMPLETE/"}}], "archlinux": [{"lastseen": "2023-06-23T14:58:24", "description": "Arch Linux Security Advisory ASA-201703-7\n=========================================\n\nSeverity: Low\nDate : 2017-03-13\nCVE-ID : CVE-2017-2636\nPackage : linux-grsec\nType : privilege escalation\nRemote : No\nLink : https://security.archlinux.org/AVG-201\n\nSummary\n=======\n\nThe package linux-grsec before version 1:4.9.14.r201703121245-1 is\nvulnerable to privilege escalation.\n\nResolution\n==========\n\nUpgrade to 1:4.9.14.r201703121245-1.\n\n# pacman -Syu \"linux-grsec>=1:4.9.14.r201703121245-1\"\n\nThe problem has been fixed upstream in version 4.9.14.r201703121245.\n\nWorkaround\n==========\n\n# echo \"install n_hdlc /bin/true\" >> /etc/modprobe.d/disable-\nn_hdlc.conf\n\nDescription\n===========\n\nA race condition flaw was found in the N_HLDC Linux kernel driver when\naccessing the n_hdlc.tbuf list that can lead to double free. A local,\nunprivileged user able to set the HDLC line discipline on the tty\ndevice could use this flaw to crash the system or increase their\nprivileges on the system.\n\nImpact\n======\n\nA local attacker is able to escalate privileges or crash the system if\nthe n_hdlc kernel module has already been explicitly loaded by an\nadministrator.\n\nReferences\n==========\n\nhttps://bugs.archlinux.org/task/53242\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=82f2341c94d270421f383641b7cd670e474db56b\nhttp://seclists.org/oss-sec/2017/q1/569\nhttps://security.archlinux.org/CVE-2017-2636", "cvss3": {"exploitabilityScore": 1.0, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.0, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-03-13T00:00:00", "type": "archlinux", "title": "[ASA-201703-7] linux-grsec: privilege escalation", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-2636"], "modified": "2017-03-13T00:00:00", "id": "ASA-201703-7", "href": "https://security.archlinux.org/ASA-201703-7", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-06-23T14:58:23", "description": "Arch Linux Security Advisory ASA-201703-6\n=========================================\n\nSeverity: High\nDate : 2017-03-12\nCVE-ID : CVE-2017-2636\nPackage : linux-lts\nType : privilege escalation\nRemote : No\nLink : https://security.archlinux.org/AVG-200\n\nSummary\n=======\n\nThe package linux-lts before version 4.9.14-1 is vulnerable to\nprivilege escalation.\n\nResolution\n==========\n\nUpgrade to 4.9.14-1.\n\n# pacman -Syu \"linux-lts>=4.9.14-1\"\n\nThe problem has been fixed upstream in version 4.9.14.\n\nWorkaround\n==========\n\n# echo \"install n_hdlc /bin/true\" >> /etc/modprobe.d/disable-\nn_hdlc.conf\n\nDescription\n===========\n\nA race condition flaw was found in the N_HLDC Linux kernel driver when\naccessing the n_hdlc.tbuf list that can lead to double free. A local,\nunprivileged user able to set the HDLC line discipline on the tty\ndevice could use this flaw to crash the system or increase their\nprivileges on the system.\n\nImpact\n======\n\nA local attacker is able to escalate privileges or crash the system.\n\nReferences\n==========\n\nhttps://bugs.archlinux.org/task/53242\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=82f2341c94d270421f383641b7cd670e474db56b\nhttp://seclists.org/oss-sec/2017/q1/569\nhttps://security.archlinux.org/CVE-2017-2636", "cvss3": {"exploitabilityScore": 1.0, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.0, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-03-12T00:00:00", "type": "archlinux", "title": "[ASA-201703-6] linux-lts: privilege escalation", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-2636"], "modified": "2017-03-12T00:00:00", "id": "ASA-201703-6", "href": "https://security.archlinux.org/ASA-201703-6", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-06-23T14:58:22", "description": "Arch Linux Security Advisory ASA-201703-8\n=========================================\n\nSeverity: High\nDate : 2017-03-14\nCVE-ID : CVE-2017-2636\nPackage : linux\nType : privilege escalation\nRemote : No\nLink : https://security.archlinux.org/AVG-192\n\nSummary\n=======\n\nThe package linux before version 4.10.2-1 is vulnerable to privilege\nescalation.\n\nResolution\n==========\n\nUpgrade to 4.10.2-1.\n\n# pacman -Syu \"linux>=4.10.2-1\"\n\nThe problem has been fixed upstream in version 4.10.2.\n\nWorkaround\n==========\n\n# echo \"install n_hdlc /bin/true\" >> /etc/modprobe.d/disable-\nn_hdlc.conf\n\nDescription\n===========\n\nA race condition flaw was found in the N_HLDC Linux kernel driver when\naccessing the n_hdlc.tbuf list that can lead to double free. A local,\nunprivileged user able to set the HDLC line discipline on the tty\ndevice could use this flaw to crash the system or increase their\nprivileges on the system.\n\nImpact\n======\n\nA local attacker is able to escalate privileges or crash the system.\n\nReferences\n==========\n\nhttps://bugs.archlinux.org/task/53242\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=82f2341c94d270421f383641b7cd670e474db56b\nhttp://seclists.org/oss-sec/2017/q1/569\nhttps://security.archlinux.org/CVE-2017-2636", "cvss3": {"exploitabilityScore": 1.0, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.0, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-03-14T00:00:00", "type": "archlinux", "title": "[ASA-201703-8] linux: privilege escalation", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2017-2636"], "modified": "2017-03-14T00:00:00", "id": "ASA-201703-8", "href": "https://security.archlinux.org/ASA-201703-8", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-06-23T14:58:22", "description": "Arch Linux Security Advisory ASA-201703-13\n==========================================\n\nSeverity: High\nDate : 2017-03-16\nCVE-ID : CVE-2017-2636\nPackage : linux-zen\nType : privilege escalation\nRemote : No\nLink : https://security.archlinux.org/AVG-203\n\nSummary\n=======\n\nThe package linux-zen before version 4.10.2-1 is vulnerable to\nprivilege escalation.\n\nResolution\n==========\n\nUpgrade to 4.10.2-1.\n\n# pacman -Syu \"linux-zen>=4.10.2-1\"\n\nThe problem has been fixed upstream in version 4.10.2.\n\nWorkaround\n==========\n\n# echo \"install n_hdlc /bin/true\" >> /etc/modprobe.d/disable-\nn_hdlc.conf\n\nDescription\n===========\n\nA race condition flaw was found in the N_HLDC Linux kernel driver when\naccessing the n_hdlc.tbuf list that can lead to double free. A local,\nunprivileged user able to set the HDLC line discipline on the tty\ndevice could use this flaw to crash the system or increase their\nprivileges on the system.\n\nImpact\n======\n\nA local attacker is able to escalate privileges or crash the system.\n\nReferences\n==========\n\nhttps://bugs.archlinux.org/task/53242\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=82f2341c94d270421f383641b7cd670e474db56b\nhttp://seclists.org/oss-sec/2017/q1/569\nhttps://security.archlinux.org/CVE-2017-2636", "cvss3": {"exploitabilityScore": 1.0, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "UNCHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "baseScore": 7.0, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 5.9}, "published": "2017-03-16T00:00:00", "type": 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kernel did not validate certain size data after an XFRM_MSG_NEWAE update, which allowed local users to obtain root privileges or cause a denial of service (heap-based out-of-bounds access) by leveraging the CAP_NET_ADMIN capability, as demonstrated during a Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52 (bnc#1030573).\n\n - CVE-2016-10200: Race condition in the L2TPv3 IP Encapsulation feature in the Linux kernel allowed local users to gain privileges or cause a denial of service (use-after-free) by making multiple bind system calls without properly ascertaining whether a socket has the SOCK_ZAPPED status, related to net/l2tp/l2tp_ip.c and net/l2tp/l2tp_ip6.c (bnc#1028415).\n\n - CVE-2017-2636: Race condition in drivers/tty/n_hdlc.c in the Linux kernel allowed local users to gain privileges or cause a denial of service (double free) by setting the HDLC line discipline (bnc#1027565).\n\n - CVE-2017-6345: The LLC subsystem in the Linux kernel did not ensure that a certain destructor exists in required circumstances, which allowed local users to cause a denial of service (BUG_ON) or possibly have unspecified other impact via crafted system calls (bnc#1027190).\n\n - CVE-2017-6346: Race condition in net/packet/af_packet.c in the Linux kernel allowed local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a multithreaded application that made PACKET_FANOUT setsockopt system calls (bnc#1027189).\n\n - CVE-2017-6353: net/sctp/socket.c in the Linux kernel did not properly restrict association peel-off operations during certain wait states, which allowed local users to cause a denial of service (invalid unlock and double free) via a multithreaded application. NOTE: this vulnerability exists because of an incorrect fix for CVE-2017-5986 (bnc#1025235).\n\n - CVE-2017-6214: The tcp_splice_read function in net/ipv4/tcp.c in the Linux kernel allowed remote attackers to cause a denial of service (infinite loop and soft lockup) via vectors involving a TCP packet with the URG flag (bnc#1026722).\n\n - CVE-2016-2117: The atl2_probe function in drivers/net/ethernet/atheros/atlx/atl2.c in the Linux kernel incorrectly enables scatter/gather I/O, which allowed remote attackers to obtain sensitive information from kernel memory by reading packet data (bnc#968697).\n\n - CVE-2017-6347: The ip_cmsg_recv_checksum function in net/ipv4/ip_sockglue.c in the Linux kernel has incorrect expectations about skb data layout, which allowed local users to cause a denial of service (buffer over-read) or possibly have unspecified other impact via crafted system calls, as demonstrated by use of the MSG_MORE flag in conjunction with loopback UDP transmission (bnc#1027179).\n\n - CVE-2016-9191: The cgroup offline implementation in the Linux kernel mishandled certain drain operations, which allowed local users to cause a denial of service (system hang) by leveraging access to a container environment for executing a crafted application, as demonstrated by trinity (bnc#1008842).\n\n - CVE-2017-2596: The nested_vmx_check_vmptr function in arch/x86/kvm/vmx.c in the Linux kernel improperly emulates the VMXON instruction, which allowed KVM L1 guest OS users to cause a denial of service (host OS memory consumption) by leveraging the mishandling of page references (bnc#1022785).\n\nThe following non-security bugs were fixed :\n\n - ACPI: Do not create a platform_device for IOAPIC/IOxAPIC (bsc#1028819).\n\n - ACPI, ioapic: Clear on-stack resource before using it (bsc#1028819).\n\n - ACPI: Remove platform devices from a bus on removal (bsc#1028819).\n\n - add mainline tag to one hyperv patch\n\n - bnx2x: allow adding VLANs while interface is down (bsc#1027273).\n\n - btrfs: backref: Fix soft lockup in __merge_refs function (bsc#1017641).\n\n - btrfs: incremental send, do not delay rename when parent inode is new (bsc#1028325).\n\n - btrfs: incremental send, do not issue invalid rmdir operations (bsc#1028325).\n\n - btrfs: qgroup: Move half of the qgroup accounting time out of commit trans (bsc#1017461).\n\n - btrfs: send, fix failure to rename top level inode due to name collision (bsc#1028325).\n\n - btrfs: serialize subvolume mounts with potentially mismatching rw flags (bsc#951844 bsc#1024015)\n\n - crypto: algif_hash - avoid zero-sized array (bnc#1007962).\n\n - cxgb4vf: do not offload Rx checksums for IPv6 fragments (bsc#1026692).\n\n - drivers: hv: vmbus: Prevent sending data on a rescinded channel (fate#320485, bug#1028217).\n\n - drm/i915: Add intel_uncore_suspend / resume functions (bsc#1011913).\n\n - drm/i915: Listen for PMIC bus access notifications (bsc#1011913).\n\n - drm/mgag200: Added support for the new device G200eH3 (bsc#1007959, fate#322780)\n\n - ext4: fix fencepost in s_first_meta_bg validation (bsc#1029986).\n\n - Fix kABI breakage of dccp in 4.4.56 (stable-4.4.56).\n\n - futex: Add missing error handling to FUTEX_REQUEUE_PI (bsc#969755).\n\n - futex: Fix potential use-after-free in FUTEX_REQUEUE_PI (bsc#969755).\n\n - i2c: designware-baytrail: Acquire P-Unit access on bus acquire (bsc#1011913).\n\n - i2c: designware-baytrail: Call pmic_bus_access_notifier_chain (bsc#1011913).\n\n - i2c: designware-baytrail: Fix race when resetting the semaphore (bsc#1011913).\n\n - i2c: designware-baytrail: Only check iosf_mbi_available() for shared hosts (bsc#1011913).\n\n - i2c: designware: Disable pm for PMIC i2c-bus even if there is no _SEM method (bsc#1011913).\n\n - i2c-designware: increase timeout (bsc#1011913).\n\n - i2c: designware: Never suspend i2c-busses used for accessing the system PMIC (bsc#1011913).\n\n - i2c: designware: Rename accessor_flags to flags (bsc#1011913).\n\n - kABI: protect struct iscsi_conn (kabi).\n\n - kABI: protect struct se_node_acl (kabi).\n\n - kABI: restore can_rx_register parameters (kabi).\n\n - kgr/module: make a taint flag module-specific (fate#313296).\n\n - kgr: remove all arch-specific kgraft header files (fate#313296).\n\n - l2tp: fix address test in __l2tp_ip6_bind_lookup() (bsc#1028415).\n\n - l2tp: fix lookup for sockets not bound to a device in l2tp_ip (bsc#1028415).\n\n - l2tp: fix racy socket lookup in l2tp_ip and l2tp_ip6 bind() (bsc#1028415).\n\n - l2tp: hold socket before dropping lock in l2tp_ip(, 6)_recv() (bsc#1028415).\n\n - l2tp: lock socket before checking flags in connect() (bsc#1028415).\n\n - md/raid1: add rcu protection to rdev in fix_read_error (References: bsc#998106,bsc#1020048,bsc#982783).\n\n - md/raid1: fix a use-after-free bug (bsc#998106,bsc#1020048,bsc#982783).\n\n - md/raid1: handle flush request correctly (bsc#998106,bsc#1020048,bsc#982783).\n\n - md/raid1: Refactor raid1_make_request (bsc#998106,bsc#1020048,bsc#982783).\n\n - mm: fix set pageblock migratetype in deferred struct page init (bnc#1027195).\n\n - mm/page_alloc: Remove useless parameter of\n __free_pages_boot_core (bnc#1027195).\n\n - module: move add_taint_module() to a header file (fate#313296).\n\n - net/ena: change condition for host attribute configuration (bsc#1026509).\n\n - net/ena: change driver's default timeouts (bsc#1026509).\n\n - net: ena: change the return type of ena_set_push_mode() to be void (bsc#1026509).\n\n - net: ena: Fix error return code in ena_device_init() (bsc#1026509).\n\n - net/ena: fix ethtool RSS flow configuration (bsc#1026509).\n\n - net/ena: fix NULL dereference when removing the driver after device reset failed (bsc#1026509).\n\n - net/ena: fix potential access to freed memory during device reset (bsc#1026509).\n\n - net/ena: fix queues number calculation (bsc#1026509).\n\n - net/ena: fix RSS default hash configuration (bsc#1026509).\n\n - net/ena: reduce the severity of ena printouts (bsc#1026509).\n\n - net/ena: refactor ena_get_stats64 to be atomic context safe (bsc#1026509).\n\n - net/ena: remove ntuple filter support from device feature list (bsc#1026509).\n\n - net: ena: remove superfluous check in ena_remove() (bsc#1026509).\n\n - net: ena: Remove unnecessary pci_set_drvdata() (bsc#1026509).\n\n - net/ena: update driver version to 1.1.2 (bsc#1026509).\n\n - net/ena: use READ_ONCE to access completion descriptors (bsc#1026509).\n\n - net: ena: use setup_timer() and mod_timer() (bsc#1026509).\n\n - net/mlx4_core: Avoid command timeouts during VF driver device shutdown (bsc#1028017).\n\n - net/mlx4_core: Avoid delays during VF driver device shutdown (bsc#1028017).\n\n - net/mlx4_core: Fix racy CQ (Completion Queue) free (bsc#1028017).\n\n - net/mlx4_core: Fix when to save some qp context flags for dynamic VST to VGT transitions (bsc#1028017).\n\n - net/mlx4_core: Use cq quota in SRIOV when creating completion EQs (bsc#1028017).\n\n - net/mlx4_en: Fix bad WQE issue (bsc#1028017).\n\n - NFS: do not try to cross a mountpount when there isn't one there (bsc#1028041).\n\n - nvme: Do not suspend admin queue that wasn't created (bsc#1026505).\n\n - nvme: Suspend all queues before deletion (bsc#1026505).\n\n - PCI: hv: Fix wslot_to_devfn() to fix warnings on device removal (fate#320485, bug#1028217).\n\n - PCI: hv: Use device serial number as PCI domain (fate#320485, bug#1028217).\n\n - powerpc: Blacklist GCC 5.4 6.1 and 6.2 (boo#1028895).\n\n - RAID1: a new I/O barrier implementation to remove resync window (bsc#998106,bsc#1020048,bsc#982783).\n\n - RAID1: avoid unnecessary spin locks in I/O barrier code (bsc#998106,bsc#1020048,bsc#982783).\n\n - Revert 'give up on gcc ilog2() constant optimizations' (kabi).\n\n - Revert 'net: introduce device min_header_len' (kabi).\n\n - Revert 'net/mlx4_en: Avoid unregister_netdev at shutdown flow' (bsc#1028017).\n\n - Revert 'nfit, libnvdimm: fix interleave set cookie calculation' (kabi).\n\n - Revert 'RDMA/core: Fix incorrect structure packing for booleans' (kabi).\n\n - Revert 'target: Fix NULL dereference during LUN lookup + active I/O shutdown' (kabi).\n\n - rtlwifi: rtl_usb: Fix missing entry in USB driver's private data (bsc#1026462).\n\n - s390/kmsg: add missing kmsg descriptions (bnc#1025683, LTC#151573).\n\n - s390/mm: fix zone calculation in arch_add_memory() (bnc#1025683, LTC#152318).\n\n - sched/loadavg: Avoid loadavg spikes caused by delayed NO_HZ accounting (bsc#1018419).\n\n - scsi_dh_alua: Do not modify the interval value for retries (bsc#1012910).\n\n - scsi: do not print 'reservation conflict' for TEST UNIT READY (bsc#1027054).\n\n - softirq: Let ksoftirqd do its job (bsc#1019618).\n\n - supported.conf: Add tcp_westwood as supported module (fate#322432)\n\n - taint/module: Clean up global and module taint flags handling (fate#313296).\n\n - Update mainline reference in patches.drivers/drm-ast-Fix-memleaks-in-error-path-in-as t_fb_create.patch See (bsc#1028158) for the context in which this was discovered upstream.\n\n - x86/apic/uv: Silence a shift wrapping warning (bsc#1023866).\n\n - x86/mce: Do not print MCEs when mcelog is active (bsc#1013994).\n\n - x86, mm: fix gup_pte_range() vs DAX mappings (bsc#1026405).\n\n - x86/mm/gup: Simplify get_user_pages() PTE bit handling (bsc#1026405).\n\n - x86/platform/intel/iosf_mbi: Add a mutex for P-Unit access (bsc#1011913).\n\n - x86/platform/intel/iosf_mbi: Add a PMIC bus access notifier (bsc#1011913).\n\n - x86/platform: Remove warning message for duplicate NMI handlers (bsc#1029220).\n\n - x86/platform/UV: Add basic CPU NMI health check (bsc#1023866).\n\n - x86/platform/UV: Add Support for UV4 Hubless NMIs (bsc#1023866).\n\n - x86/platform/UV: Add Support for UV4 Hubless systems (bsc#1023866).\n\n - x86/platform/UV: Clean up the NMI code to match current coding style (bsc#1023866).\n\n - x86/platform/UV: Clean up the UV APIC code (bsc#1023866).\n\n - x86/platform/UV: Ensure uv_system_init is called when necessary (bsc#1023866).\n\n - x86/platform/UV: Fix 2 socket config problem (bsc#1023866).\n\n - x86/platform/UV: Fix panic with missing UVsystab support (bsc#1023866).\n\n - x86/platform/UV: Initialize PCH GPP_D_0 NMI Pin to be NMI source (bsc#1023866).\n\n - x86/platform/UV: Verify NMI action is valid, default is standard (bsc#1023866).\n\n - xen-blkfront: correct maximum segment accounting (bsc#1018263).\n\n - xen-blkfront: do not call talk_to_blkback when already connected to blkback.\n\n - xen/blkfront: Fix crash if backend does not follow the right states.\n\n - xen-blkfront: free resources if xlvbd_alloc_gendisk fails.\n\n - xen/netback: set default upper limit of tx/rx queues to 8 (bnc#1019163).\n\n - xen/netfront: set default upper limit of tx/rx queues to 8 (bnc#1019163).\n\n - xfs: do not take the IOLOCK exclusive for direct I/O page invalidation (bsc#1015609).", "cvss3": {}, "published": "2017-04-03T00:00:00", "type": "nessus", "title": "openSUSE Security Update : the Linux Kernel (openSUSE-2017-418)", "bulletinFamily": "scanner", "cvss2": {}, "cvelist": ["CVE-2016-10200", "CVE-2016-2117", "CVE-2016-9191", "CVE-2017-2596", "CVE-2017-2636", "CVE-2017-5986", "CVE-2017-6214", "CVE-2017-6345", "CVE-2017-6346", "CVE-2017-6347", "CVE-2017-6353", "CVE-2017-7184"], "modified": "2021-01-19T00:00:00", "cpe": ["p-cpe:/a:novell:opensuse:kernel-debug", "p-cpe:/a:novell:opensuse:kernel-debug-base", "p-cpe:/a:novell:opensuse:kernel-debug-base-debuginfo", "p-cpe:/a:novell:opensuse:kernel-debug-debuginfo", "p-cpe:/a:novell:opensuse:kernel-debug-debugsource", "p-cpe:/a:novell:opensuse:kernel-debug-devel", "p-cpe:/a:novell:opensuse:kernel-debug-devel-debuginfo", "p-cpe:/a:novell:opensuse:kernel-default", "p-cpe:/a:novell:opensuse:kernel-default-base", "p-cpe:/a:novell:opensuse:kernel-default-base-debuginfo", "p-cpe:/a:novell:opensuse:kernel-default-debuginfo", "p-cpe:/a:novell:opensuse:kernel-default-debugsource", "p-cpe:/a:novell:opensuse:kernel-default-devel", "p-cpe:/a:novell:opensuse:kernel-devel", "p-cpe:/a:novell:opensuse:kernel-docs-html", "p-cpe:/a:novell:opensuse:kernel-docs-pdf", "p-cpe:/a:novell:opensuse:kernel-macros", "p-cpe:/a:novell:opensuse:kernel-obs-build", "p-cpe:/a:novell:opensuse:kernel-obs-build-debugsource", "p-cpe:/a:novell:opensuse:kernel-obs-qa", "p-cpe:/a:novell:opensuse:kernel-source", "p-cpe:/a:novell:opensuse:kernel-source-vanilla", "p-cpe:/a:novell:opensuse:kernel-syms", "p-cpe:/a:novell:opensuse:kernel-vanilla", "p-cpe:/a:novell:opensuse:kernel-vanilla-base", "p-cpe:/a:novell:opensuse:kernel-vanilla-base-debuginfo", "p-cpe:/a:novell:opensuse:kernel-vanilla-debuginfo", "p-cpe:/a:novell:opensuse:kernel-vanilla-debugsource", "p-cpe:/a:novell:opensuse:kernel-vanilla-devel", "cpe:/o:novell:opensuse:42.2"], "id": "OPENSUSE-2017-418.NASL", "href": "https://www.tenable.com/plugins/nessus/99156", "sourceData": "#%NASL_MIN_LEVEL 70300\n#\n# (C) Tenable Network Security, Inc.\n#\n# The descriptive text and package checks in this plugin were\n# extracted from openSUSE Security Update openSUSE-2017-418.\n#\n# The text description of this plugin is (C) SUSE LLC.\n#\n\ninclude('deprecated_nasl_level.inc');\ninclude('compat.inc');\n\nif (description)\n{\n script_id(99156);\n script_version(\"3.4\");\n script_set_attribute(attribute:\"plugin_modification_date\", value:\"2021/01/19\");\n\n script_cve_id(\"CVE-2016-10200\", \"CVE-2016-2117\", \"CVE-2016-9191\", \"CVE-2017-2596\", \"CVE-2017-2636\", \"CVE-2017-5986\", \"CVE-2017-6214\", \"CVE-2017-6345\", \"CVE-2017-6346\", \"CVE-2017-6347\", \"CVE-2017-6353\", \"CVE-2017-7184\");\n\n script_name(english:\"openSUSE Security Update : the Linux Kernel (openSUSE-2017-418)\");\n script_summary(english:\"Check for the openSUSE-2017-418 patch\");\n\n script_set_attribute(\n attribute:\"synopsis\", \n value:\"The remote openSUSE host is missing a security update.\"\n );\n script_set_attribute(\n attribute:\"description\", \n value:\n\"The openSUSE Leap 42.2 kernel was updated to 4.4.56 fix various\nsecurity issues and bugs.\n\nThe following security bugs were fixed :\n\n - CVE-2017-7184: The xfrm_replay_verify_len function in\n net/xfrm/xfrm_user.c in the Linux kernel did not\n validate certain size data after an XFRM_MSG_NEWAE\n update, which allowed local users to obtain root\n privileges or cause a denial of service (heap-based\n out-of-bounds access) by leveraging the CAP_NET_ADMIN\n capability, as demonstrated during a Pwn2Own competition\n at CanSecWest 2017 for the Ubuntu 16.10 linux-image-*\n package 4.8.0.41.52 (bnc#1030573).\n\n - CVE-2016-10200: Race condition in the L2TPv3 IP\n Encapsulation feature in the Linux kernel allowed local\n users to gain privileges or cause a denial of service\n (use-after-free) by making multiple bind system calls\n without properly ascertaining whether a socket has the\n SOCK_ZAPPED status, related to net/l2tp/l2tp_ip.c and\n net/l2tp/l2tp_ip6.c (bnc#1028415).\n\n - CVE-2017-2636: Race condition in drivers/tty/n_hdlc.c in\n the Linux kernel allowed local users to gain privileges\n or cause a denial of service (double free) by setting\n the HDLC line discipline (bnc#1027565).\n\n - CVE-2017-6345: The LLC subsystem in the Linux kernel did\n not ensure that a certain destructor exists in required\n circumstances, which allowed local users to cause a\n denial of service (BUG_ON) or possibly have unspecified\n other impact via crafted system calls (bnc#1027190).\n\n - CVE-2017-6346: Race condition in net/packet/af_packet.c\n in the Linux kernel allowed local users to cause a\n denial of service (use-after-free) or possibly have\n unspecified other impact via a multithreaded application\n that made PACKET_FANOUT setsockopt system calls\n (bnc#1027189).\n\n - CVE-2017-6353: net/sctp/socket.c in the Linux kernel did\n not properly restrict association peel-off operations\n during certain wait states, which allowed local users to\n cause a denial of service (invalid unlock and double\n free) via a multithreaded application. NOTE: this\n vulnerability exists because of an incorrect fix for\n CVE-2017-5986 (bnc#1025235).\n\n - CVE-2017-6214: The tcp_splice_read function in\n net/ipv4/tcp.c in the Linux kernel allowed remote\n attackers to cause a denial of service (infinite loop\n and soft lockup) via vectors involving a TCP packet with\n the URG flag (bnc#1026722).\n\n - CVE-2016-2117: The atl2_probe function in\n drivers/net/ethernet/atheros/atlx/atl2.c in the Linux\n kernel incorrectly enables scatter/gather I/O, which\n allowed remote attackers to obtain sensitive information\n from kernel memory by reading packet data (bnc#968697).\n\n - CVE-2017-6347: The ip_cmsg_recv_checksum function in\n net/ipv4/ip_sockglue.c in the Linux kernel has incorrect\n expectations about skb data layout, which allowed local\n users to cause a denial of service (buffer over-read) or\n possibly have unspecified other impact via crafted\n system calls, as demonstrated by use of the MSG_MORE\n flag in conjunction with loopback UDP transmission\n (bnc#1027179).\n\n - CVE-2016-9191: The cgroup offline implementation in the\n Linux kernel mishandled certain drain operations, which\n allowed local users to cause a denial of service (system\n hang) by leveraging access to a container environment\n for executing a crafted application, as demonstrated by\n trinity (bnc#1008842).\n\n - CVE-2017-2596: The nested_vmx_check_vmptr function in\n arch/x86/kvm/vmx.c in the Linux kernel improperly\n emulates the VMXON instruction, which allowed KVM L1\n guest OS users to cause a denial of service (host OS\n memory consumption) by leveraging the mishandling of\n page references (bnc#1022785).\n\nThe following non-security bugs were fixed :\n\n - ACPI: Do not create a platform_device for IOAPIC/IOxAPIC\n (bsc#1028819).\n\n - ACPI, ioapic: Clear on-stack resource before using it\n (bsc#1028819).\n\n - ACPI: Remove platform devices from a bus on removal\n (bsc#1028819).\n\n - add mainline tag to one hyperv patch\n\n - bnx2x: allow adding VLANs while interface is down\n (bsc#1027273).\n\n - btrfs: backref: Fix soft lockup in __merge_refs function\n (bsc#1017641).\n\n - btrfs: incremental send, do not delay rename when parent\n inode is new (bsc#1028325).\n\n - btrfs: incremental send, do not issue invalid rmdir\n operations (bsc#1028325).\n\n - btrfs: qgroup: Move half of the qgroup accounting time\n out of commit trans (bsc#1017461).\n\n - btrfs: send, fix failure to rename top level inode due\n to name collision (bsc#1028325).\n\n - btrfs: serialize subvolume mounts with potentially\n mismatching rw flags (bsc#951844 bsc#1024015)\n\n - crypto: algif_hash - avoid zero-sized array\n (bnc#1007962).\n\n - cxgb4vf: do not offload Rx checksums for IPv6 fragments\n (bsc#1026692).\n\n - drivers: hv: vmbus: Prevent sending data on a rescinded\n channel (fate#320485, bug#1028217).\n\n - drm/i915: Add intel_uncore_suspend / resume functions\n (bsc#1011913).\n\n - drm/i915: Listen for PMIC bus access notifications\n (bsc#1011913).\n\n - drm/mgag200: Added support for the new device G200eH3\n (bsc#1007959, fate#322780)\n\n - ext4: fix fencepost in s_first_meta_bg validation\n (bsc#1029986).\n\n - Fix kABI breakage of dccp in 4.4.56 (stable-4.4.56).\n\n - futex: Add missing error handling to FUTEX_REQUEUE_PI\n (bsc#969755).\n\n - futex: Fix potential use-after-free in FUTEX_REQUEUE_PI\n (bsc#969755).\n\n - i2c: designware-baytrail: Acquire P-Unit access on bus\n acquire (bsc#1011913).\n\n - i2c: designware-baytrail: Call\n pmic_bus_access_notifier_chain (bsc#1011913).\n\n - i2c: designware-baytrail: Fix race when resetting the\n semaphore (bsc#1011913).\n\n - i2c: designware-baytrail: Only check\n iosf_mbi_available() for shared hosts (bsc#1011913).\n\n - i2c: designware: Disable pm for PMIC i2c-bus even if\n there is no _SEM method (bsc#1011913).\n\n - i2c-designware: increase timeout (bsc#1011913).\n\n - i2c: designware: Never suspend i2c-busses used for\n accessing the system PMIC (bsc#1011913).\n\n - i2c: designware: Rename accessor_flags to flags\n (bsc#1011913).\n\n - kABI: protect struct iscsi_conn (kabi).\n\n - kABI: protect struct se_node_acl (kabi).\n\n - kABI: restore can_rx_register parameters (kabi).\n\n - kgr/module: make a taint flag module-specific\n (fate#313296).\n\n - kgr: remove all arch-specific kgraft header files\n (fate#313296).\n\n - l2tp: fix address test in __l2tp_ip6_bind_lookup()\n (bsc#1028415).\n\n - l2tp: fix lookup for sockets not bound to a device in\n l2tp_ip (bsc#1028415).\n\n - l2tp: fix racy socket lookup in l2tp_ip and l2tp_ip6\n bind() (bsc#1028415).\n\n - l2tp: hold socket before dropping lock in l2tp_ip(,\n 6)_recv() (bsc#1028415).\n\n - l2tp: lock socket before checking flags in connect()\n (bsc#1028415).\n\n - md/raid1: add rcu protection to rdev in fix_read_error\n (References: bsc#998106,bsc#1020048,bsc#982783).\n\n - md/raid1: fix a use-after-free bug\n (bsc#998106,bsc#1020048,bsc#982783).\n\n - md/raid1: handle flush request correctly\n (bsc#998106,bsc#1020048,bsc#982783).\n\n - md/raid1: Refactor raid1_make_request\n (bsc#998106,bsc#1020048,bsc#982783).\n\n - mm: fix set pageblock migratetype in deferred struct\n page init (bnc#1027195).\n\n - mm/page_alloc: Remove useless parameter of\n __free_pages_boot_core (bnc#1027195).\n\n - module: move add_taint_module() to a header file\n (fate#313296).\n\n - net/ena: change condition for host attribute\n configuration (bsc#1026509).\n\n - net/ena: change driver's default timeouts (bsc#1026509).\n\n - net: ena: change the return type of ena_set_push_mode()\n to be void (bsc#1026509).\n\n - net: ena: Fix error return code in ena_device_init()\n (bsc#1026509).\n\n - net/ena: fix ethtool RSS flow configuration\n (bsc#1026509).\n\n - net/ena: fix NULL dereference when removing the driver\n after device reset failed (bsc#1026509).\n\n - net/ena: fix potential access to freed memory during\n device reset (bsc#1026509).\n\n - net/ena: fix queues number calculation (bsc#1026509).\n\n - net/ena: fix RSS default hash configuration\n (bsc#1026509).\n\n - net/ena: reduce the severity of ena printouts\n (bsc#1026509).\n\n - net/ena: refactor ena_get_stats64 to be atomic context\n safe (bsc#1026509).\n\n - net/ena: remove ntuple filter support from device\n feature list (bsc#1026509).\n\n - net: ena: remove superfluous check in ena_remove()\n (bsc#1026509).\n\n - net: ena: Remove unnecessary pci_set_drvdata()\n (bsc#1026509).\n\n - net/ena: update driver version to 1.1.2 (bsc#1026509).\n\n - net/ena: use READ_ONCE to access completion descriptors\n (bsc#1026509).\n\n - net: ena: use setup_timer() and mod_timer()\n (bsc#1026509).\n\n - net/mlx4_core: Avoid command timeouts during VF driver\n device shutdown (bsc#1028017).\n\n - net/mlx4_core: Avoid delays during VF driver device\n shutdown (bsc#1028017).\n\n - net/mlx4_core: Fix racy CQ (Completion Queue) free\n (bsc#1028017).\n\n - net/mlx4_core: Fix when to save some qp context flags\n for dynamic VST to VGT transitions (bsc#1028017).\n\n - net/mlx4_core: Use cq quota in SRIOV when creating\n completion EQs (bsc#1028017).\n\n - net/mlx4_en: Fix bad WQE issue (bsc#1028017).\n\n - NFS: do not try to cross a mountpount when there isn't\n one there (bsc#1028041).\n\n - nvme: Do not suspend admin queue that wasn't created\n (bsc#1026505).\n\n - nvme: Suspend all queues before deletion (bsc#1026505).\n\n - PCI: hv: Fix wslot_to_devfn() to fix warnings on device\n removal (fate#320485, bug#1028217).\n\n - PCI: hv: Use device serial number as PCI domain\n (fate#320485, bug#1028217).\n\n - powerpc: Blacklist GCC 5.4 6.1 and 6.2 (boo#1028895).\n\n - RAID1: a new I/O barrier implementation to remove resync\n window (bsc#998106,bsc#1020048,bsc#982783).\n\n - RAID1: avoid unnecessary spin locks in I/O barrier code\n (bsc#998106,bsc#1020048,bsc#982783).\n\n - Revert 'give up on gcc ilog2() constant optimizations'\n (kabi).\n\n - Revert 'net: introduce device min_header_len' (kabi).\n\n - Revert 'net/mlx4_en: Avoid unregister_netdev at shutdown\n flow' (bsc#1028017).\n\n - Revert 'nfit, libnvdimm: fix interleave set cookie\n calculation' (kabi).\n\n - Revert 'RDMA/core: Fix incorrect structure packing for\n booleans' (kabi).\n\n - Revert 'target: Fix NULL dereference during LUN lookup +\n active I/O shutdown' (kabi).\n\n - rtlwifi: rtl_usb: Fix missing entry in USB driver's\n private data (bsc#1026462).\n\n - s390/kmsg: add missing kmsg descriptions (bnc#1025683,\n LTC#151573).\n\n - s390/mm: fix zone calculation in arch_add_memory()\n (bnc#1025683, LTC#152318).\n\n - sched/loadavg: Avoid loadavg spikes caused by delayed\n NO_HZ accounting (bsc#1018419).\n\n - scsi_dh_alua: Do not modify the interval value for\n retries (bsc#1012910).\n\n - scsi: do not print 'reservation conflict' for TEST UNIT\n READY (bsc#1027054).\n\n - softirq: Let ksoftirqd do its job (bsc#1019618).\n\n - supported.conf: Add tcp_westwood as supported module\n (fate#322432)\n\n - taint/module: Clean up global and module taint flags\n handling (fate#313296).\n\n - Update mainline reference in\n patches.drivers/drm-ast-Fix-memleaks-in-error-path-in-as\n t_fb_create.patch See (bsc#1028158) for the context in\n which this was discovered upstream.\n\n - x86/apic/uv: Silence a shift wrapping warning\n (bsc#1023866).\n\n - x86/mce: Do not print MCEs when mcelog is active\n (bsc#1013994).\n\n - x86, mm: fix gup_pte_range() vs DAX mappings\n (bsc#1026405).\n\n - x86/mm/gup: Simplify get_user_pages() PTE bit handling\n (bsc#1026405).\n\n - x86/platform/intel/iosf_mbi: Add a mutex for P-Unit\n access (bsc#1011913).\n\n - x86/platform/intel/iosf_mbi: Add a PMIC bus access\n notifier (bsc#1011913).\n\n - x86/platform: Remove warning message for duplicate NMI\n handlers (bsc#1029220).\n\n - x86/platform/UV: Add basic CPU NMI health check\n (bsc#1023866).\n\n - x86/platform/UV: Add Support for UV4 Hubless NMIs\n (bsc#1023866).\n\n - x86/platform/UV: Add Support for UV4 Hubless systems\n (bsc#1023866).\n\n - x86/platform/UV: Clean up the NMI code to match current\n coding style (bsc#1023866).\n\n - x86/platform/UV: Clean up the UV APIC code\n (bsc#1023866).\n\n - x86/platform/UV: Ensure uv_system_init is called when\n necessary (bsc#1023866).\n\n - x86/platform/UV: Fix 2 socket config problem\n (bsc#1023866).\n\n - x86/platform/UV: Fix panic with missing UVsystab support\n (bsc#1023866).\n\n - x86/platform/UV: Initialize PCH GPP_D_0 NMI Pin to be\n NMI source (bsc#1023866).\n\n - x86/platform/UV: Verify NMI action is valid, default is\n standard (bsc#1023866).\n\n - xen-blkfront: correct maximum segment accounting\n (bsc#1018263).\n\n - xen-blkfront: do not call talk_to_blkback when already\n connected to blkback.\n\n - xen/blkfront: Fix crash if backend does not follow the\n right states.\n\n - xen-blkfront: free resources if xlvbd_alloc_gendisk\n fails.\n\n - xen/netback: set default upper limit of tx/rx queues to\n 8 (bnc#1019163).\n\n - 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kernel's ISOFS implementation did not correctly check relocated directories when processing Rock Ridge child link (CL) tags. An attacker with physical access to the system could use a specially crafted ISO image to crash the system or, potentially, escalate their privileges on the system.(CVE-2014-5472i1/4%0\n\n - An issue was discovered in the Linux kernel's F2FS filesystem code. An out-of-bounds access vulnerability is possible the in __remove_dirty_segment() in fs/f2fs/segment.c function when mounting a crafted f2fs image.(CVE-2018-14614i1/4%0\n\n - Race condition in kernel/events/core.c in the Linux kernel before 4.4 allows local users to gain privileges or cause a denial of service via use-after-free vulnerability by leveraging incorrect handling of an swevent data structure during a CPU unplug operation.(CVE-2015-8963i1/4%0\n\n - The skbs processed by ip_cmsg_recv() are not guaranteed to be linear (e.g. when sending UDP packets over loopback with MSGMORE). Using csum_partial() on potentially the whole skb len is dangerous instead be on the safe side and use skb_checksum(). This may lead to an infoleak as the kernel memory may be checksummed and sent as part of the packet.(CVE-2017-6347i1/4%0\n\n - The apic_get_tmcct function in arch/x86/kvm/lapic.c in the KVM subsystem in the Linux kernel through 3.12.5 allows guest OS users to cause a denial of service (divide-by-zero error and host OS crash) via crafted modifications of the TMICT value.(CVE-2013-6367i1/4%0\n\n - A use-after-free issue was found in the way the Linux kernel's KVM hypervisor processed posted interrupts when nested(=1) virtualization is enabled. In nested_get_vmcs12_pages(), in case of an error while processing posted interrupt address, it unmaps the 'pi_desc_page' without resetting 'pi_desc' descriptor address, which is later used in pi_test_and_clear_on().\n A guest user/process could use this flaw to crash the host kernel resulting in DoS or potentially gain privileged access to a system.(CVE-2018-16882i1/4%0\n\n - It was discovered that the atl2_probe() function in the Atheros L2 Ethernet driver in the Linux kernel incorrectly enabled scatter/gather I/O. A remote attacker could use this flaw to obtain potentially sensitive information from the kernel memory.(CVE-2016-2117i1/4%0\n\n - A flaw was found in the way the nft_flush_table() function of the Linux kernel's netfilter tables implementation flushed rules that were referencing deleted chains. A local user who has the CAP_NET_ADMIN capability could use this flaw to crash the system.(CVE-2015-1573i1/4%0\n\n - The powermate_probe function in drivers/input/misc/powermate.c in the Linux kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor.(CVE-2016-2186i1/4%0\n\n - It was found that KVM's Write to Model Specific Register (WRMSR) instruction emulation would write non-canonical values passed in by the guest to certain MSRs in the host's context. A privileged guest user could use this flaw to crash the host.(CVE-2014-3610i1/4%0\n\n - The BPF_S_ANC_NLATTR_NEST extension implementation in the sk_run_filter function in net/core/filter.c in the Linux kernel through 3.14.3 uses the reverse order in a certain subtraction, which allows local users to cause a denial of service (over-read and system crash) via crafted BPF instructions. NOTE: the affected code was moved to the __skb_get_nlattr_nest function before the vulnerability was announced.(CVE-2014-3145i1/4%0\n\n - The yam_ioctl function in drivers/net/hamradio/yam.c in the Linux kernel before 3.12.8 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability for an SIOCYAMGCFG ioctl call.(CVE-2014-1446i1/4%0\n\n - A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system.(CVE-2017-2636i1/4%0\n\n - A flaw was found in the way Linux kernel's Transparent Huge Pages (THP) implementation handled non-huge page migration. 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Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely.(CVE-2018-14633i1/4%0\n\n - A vulnerability was found in the Linux kernel where filesystems mounted with data=ordered mode may allow an attacker to read stale data from recently allocated blocks in new files after a system 'reset' by abusing ext4 mechanics of delayed allocation.(CVE-2017-7495i1/4%0\n\n - drivers/media/platform/msm/broadcast/tsc.c in the TSC driver for the Linux kernel 3.x, as used in Qualcomm Innovation Center (QuIC) Android contributions for MSM devices and other products, allows attackers to cause a denial of service (invalid pointer dereference) or possibly have unspecified other impact via a crafted application that makes a TSC_GET_CARD_STATUS ioctl call.(CVE-2015-0573i1/4%0\n\n - It was found that the unlink and rename functionality in overlayfs did not verify the upper dentry for staleness. 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The perf_cpu_time_max_percent_handler function in kernel/events/core.c in the Linux kernel before 4.11 allows local users to cause a denial of service (integer overflow) or possibly have unspecified other impact via a large value, as demonstrated by an incorrect sample-rate calculation.(CVE-2017-18255)\n\n - In the Linux kernel before 4.13.5, a local user could create keyrings for other users via keyctl commands, setting unwanted defaults or causing a denial of service.(CVE-2017-18270)\n\n - The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel doesn't properly validate the sigevent-i1/4zsigev_notify field, which leads to out-of-bounds access in the show_timer function.(CVE-2017-18344)\n\n - arch/x86/kvm/emulate.c in the Linux kernel through 4.9.3 allows local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free) via a crafted application that leverages instruction emulation for fxrstor, fxsave, sgdt, and sidt.(CVE-2017-2584)\n\n - 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It could occur while emulating VMXON instruction in 'handle_vmon'. An L1 guest user could use this flaw to leak host memory potentially resulting in DoS.(CVE-2017-2596)\n\n - A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system.(CVE-2017-2636)\n\n - A flaw was found that can be triggered in keyring_search_iterator in keyring.c if type-i1/4zmatch is NULL. A local user could use this flaw to crash the system or, potentially, escalate their privileges.(CVE-2017-2647)\n\n - A race condition leading to a NULL pointer dereference was found in the Linux kernel's Link Layer Control implementation. A local attacker with access to ping sockets could use this flaw to crash the system.(CVE-2017-2671)\n\n - A vulnerability was found in the Linux kernel in 'tmpfs' file system. When file permissions are modified via 'chmod' and the user is not in the owning group or capable of CAP_FSETID, the setgid bit is cleared in inode_change_ok(). Setting a POSIX ACL via 'setxattr' sets the file permissions as well as the new ACL, but doesn't clear the setgid bit in a similar way this allows to bypass the check in 'chmod'.(CVE-2017-5551)\n\n - The do_shmat function in ipc/shm.c in the Linux kernel, through 4.9.12, does not restrict the address calculated by a certain rounding operation. This allows privileged local users to map page zero and, consequently, bypass a protection mechanism that exists for the mmap system call. This is possible by making crafted shmget and shmat system calls in a privileged context.(CVE-2017-5669)\n\n - A vulnerability was found in the Linux kernel where having malicious IP options present would cause the ipv4_pktinfo_prepare() function to drop/free the dst.\n This could result in a system crash or possible privilege escalation.(CVE-2017-5970)\n\n - It was reported that with Linux kernel, earlier than version v4.10-rc8, an application may trigger a BUG_ON in sctp_wait_for_sndbuf if the socket tx buffer is full, a thread is waiting on it to queue more data, and meanwhile another thread peels off the association being used by the first thread.(CVE-2017-5986)\n\n - It was found that the original fix for CVE-2016-6786 was incomplete. There exist a race between two concurrent sys_perf_event_open() calls when both try and move the same pre-existing software group into a hardware context.(CVE-2017-6001)\n\n - A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system.(CVE-2017-6074)\n\n - A flaw was found in the Linux kernel's handling of packets with the URG flag. Applications using the splice() and tcp_splice_read() functionality could allow a remote attacker to force the kernel to enter a condition in which it could loop indefinitely.(CVE-2017-6214)\n\n - The hashbin_delete function in net/irda/irqueue.c in the Linux kernel improperly manages lock dropping, which allows local users to cause a denial of service (deadlock) via crafted operations on IrDA devices.(CVE-2017-6348)\n\n - It was found that the code in net/sctp/socket.c in the Linux kernel through 4.10.1 does not properly restrict association peel-off operations during certain wait states, which allows local users to cause a denial of service (invalid unlock and double free) via a multithreaded application. This vulnerability was introduced by CVE-2017-5986 fix (commit 2dcab5984841).(CVE-2017-6353)\n\n - The keyring_search_aux function in security/keys/keyring.c in the Linux kernel allows local users to cause a denial of service via a request_key system call for the 'dead' key type.(CVE-2017-6951)\n\n - The sg_ioctl function in drivers/scsi/sg.c in the Linux kernel allows local users to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impacts via a large command size in an SG_NEXT_CMD_LEN ioctl call, leading to out-of-bounds write access in the sg_write function.(CVE-2017-7187)\n\n - In was found that in the Linux kernel, in vmw_surface_define_ioctl() function in 'drivers/gpu/drm/vmwgfx/vmwgfx_surface.c' file, a 'num_sizes' parameter is assigned a user-controlled value which is not checked if it is zero. This is used in a call to kmalloc() and later leads to dereferencing ZERO_SIZE_PTR, which in turn leads to a GPF and possibly to a kernel panic.(CVE-2017-7261)\n\n - An out-of-bounds write vulnerability was found in the Linux kernel's vmw_surface_define_ioctl() function, in the 'drivers/gpu/drm/vmwgfx/vmwgfx_surface.c' file. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.(CVE-2017-7294)\n\n - It was found that the packet_set_ring() function of the Linux kernel's networking implementation did not properly validate certain block-size data. A local attacker with CAP_NET_RAW capability could use this flaw to trigger a buffer overflow, resulting in the crash of the system. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.(CVE-2017-7308)\n\nNote that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. 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This vulnerability was\n introduced by CVE-2017-5986 fix (commit\n 2dcab5984841).(CVE-2017-6353)\n\n - The keyring_search_aux function in\n security/keys/keyring.c in the Linux kernel allows\n local users to cause a denial of service via a\n request_key system call for the 'dead' key\n type.(CVE-2017-6951)\n\n - The sg_ioctl function in drivers/scsi/sg.c in the Linux\n kernel allows local users to cause a denial of service\n (stack-based buffer overflow) or possibly have\n unspecified other impacts via a large command size in\n an SG_NEXT_CMD_LEN ioctl call, leading to out-of-bounds\n write access in the sg_write function.(CVE-2017-7187)\n\n - In was found that in the Linux kernel, in\n vmw_surface_define_ioctl() function in\n 'drivers/gpu/drm/vmwgfx/vmwgfx_surface.c' file, a\n 'num_sizes' parameter is assigned a user-controlled\n value which is not checked if it is zero. This is used\n in a call to kmalloc() and later leads to dereferencing\n ZERO_SIZE_PTR, which in turn leads to a GPF and\n possibly to a kernel panic.(CVE-2017-7261)\n\n - An out-of-bounds write vulnerability was found in the\n Linux kernel's vmw_surface_define_ioctl() function, in\n the 'drivers/gpu/drm/vmwgfx/vmwgfx_surface.c' file. Due\n to the nature of the flaw, privilege escalation cannot\n be fully ruled out, although we believe it is\n unlikely.(CVE-2017-7294)\n\n - It was found that the packet_set_ring() function of the\n Linux kernel's networking implementation did not\n properly validate certain block-size data. A local\n attacker with CAP_NET_RAW capability could use this\n flaw to trigger a buffer overflow, resulting in the\n crash of the system. Due to the nature of the flaw,\n privilege escalation cannot be fully ruled\n out.(CVE-2017-7308)\n\nNote that Tenable Network Security has extracted the preceding\ndescription block directly from the EulerOS security advisory. 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Revert 'x86/mm: Expand the exception table logic to allow new handling options' (Brian Maly) [Orabug:\n 25790387] (CVE-2016-9644)\n\n - Revert 'fix minor infoleak in get_user_ex' (Brian Maly) [Orabug: 25790387] (CVE-2016-9644)\n\n - x86/mm: Expand the exception table logic to allow new handling options (Tony Luck) [Orabug: 25790387] (CVE-2016-9644)\n\n - rebuild bumping release\n\n - net: ping: check minimum size on ICMP header length (Kees Cook) [Orabug: 25766898] (CVE-2016-8399) (CVE-2016-8399)\n\n - sg_write/bsg_write is not fit to be called under KERNEL_DS (Al Viro) [Orabug: 25765436] (CVE-2016-10088)\n\n - scsi: sg: check length passed to SG_NEXT_CMD_LEN (peter chang) [Orabug: 25751984] (CVE-2017-7187)\n\n - tty: n_hdlc: get rid of racy n_hdlc.tbuf (Alexander Popov) [Orabug: 25696677] (CVE-2017-2636)\n\n - TTY: n_hdlc, fix lockdep false positive (Jiri Slaby) [Orabug: 25696677] (CVE-2017-2636)\n\n - If Slot Status indicates changes in both Data Link Layer Status and Presence Detect, prioritize the Link status change. (Jack Vogel) \n\n - PCI: pciehp: Leave power indicator on when enabling already-enabled slot (Ashok Raj) [Orabug: 25353783]\n\n - firewire: net: guard against rx buffer overflows (Stefan Richter) [Orabug: 25451520] (CVE-2016-8633)\n\n - usbnet: cleanup after bind in probe (Oliver Neukum) [Orabug: 25463898] (CVE-2016-3951)\n\n - cdc_ncm: do not call usbnet_link_change from cdc_ncm_bind (Bjø rn Mork) [Orabug: 25463898] (CVE-2016-3951)\n\n - cdc_ncm: Add support for moving NDP to end of NCM frame (Enrico Mioso) [Orabug: 25463898] (CVE-2016-3951)\n\n - x86/mm/32: Enable full randomization on i386 and X86_32 (Hector Marco-Gisbert) [Orabug: 25463918] (CVE-2016-3672)\n\n - kvm: fix page struct leak in handle_vmon (Paolo Bonzini) [Orabug: 25507133] (CVE-2017-2596)\n\n - crypto: mcryptd - Check mcryptd algorithm compatibility (tim) [Orabug: 25507153] (CVE-2016-10147)\n\n - kvm: nVMX: Allow L1 to intercept software exceptions (#BP and #OF) (Jim Mattson) [Orabug: 25507188] (CVE-2016-9588)\n\n - KVM: x86: drop error recovery in em_jmp_far and em_ret_far (Radim Krč má ř ) [Orabug:\n 25507213] (CVE-2016-9756)\n\n - tcp: take care of truncations done by sk_filter (Eric Dumazet) [Orabug: 25507226] (CVE-2016-8645)\n\n - rose: limit sk_filter trim to payload (Willem de Bruijn) [Orabug: 25507226] (CVE-2016-8645)\n\n - tipc: check minimum bearer MTU (Michal Kubeč ek) [Orabug: 25507239] (CVE-2016-8632) (CVE-2016-8632)\n\n - fix minor infoleak in get_user_ex (Al Viro) [Orabug:\n 25507269] (CVE-2016-9178)\n\n - scsi: arcmsr: Simplify user_len checking (Borislav Petkov) [Orabug: 25507319] (CVE-2016-7425)\n\n - scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer (Dan Carpenter) [Orabug: 25507319] (CVE-2016-7425)\n\n - tmpfs: clear S_ISGID when setting posix ACLs (Gu Zheng) [Orabug: 25507341] (CVE-2016-7097) (CVE-2016-7097)\n\n - posix_acl: Clear SGID bit when setting file permissions (Jan Kara) [Orabug: 25507341] (CVE-2016-7097) (CVE-2016-7097)\n\n - ext2: convert to mbcache2 (Jan Kara) [Orabug: 25512366] (CVE-2015-8952)\n\n - ext4: convert to mbcache2 (Jan Kara) [Orabug: 25512366] (CVE-2015-8952)\n\n - mbcache2: reimplement mbcache (Jan Kara) [Orabug:\n 25512366] (CVE-2015-8952)\n\n - USB: digi_acceleport: do sanity checking for the number of ports (Oliver Neukum) [Orabug: 25512466] (CVE-2016-3140)\n\n - net/llc: avoid BUG_ON in skb_orphan (Eric Dumazet) [Orabug: 25682419] (CVE-2017-6345)\n\n - net/mlx4_core: Disallow creation of RAW QPs on a VF (Eli Cohen) \n\n - ipv4: keep skb->dst around in presence of IP options (Eric Dumazet) [Orabug: 25698300] (CVE-2017-5970)\n\n - perf/core: Fix concurrent sys_perf_event_open vs.\n 'move_group' race (Peter Zijlstra) [Orabug: 25698751] (CVE-2017-6001)\n\n - ip6_gre: fix ip6gre_err invalid reads (Er
USN-3220-2: Linux kernel (Xenial HWE) vulnerability | Cloud Foundry
