Security Bulletin: Vulnerabilities in the Linux Kernel affect PowerKVM

Summary

PowerKVM is affected by vulnerabilities in the Linux Kernel. IBM has now addressed these vulnerabilities.

Vulnerability Details

CVEID: CVE-2018-1000026 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by the improper validation of user-supplied input by the bnx2x network card driver. By sending specially crafted GSO packets, a remote attacker could exploit this vulnerability to cause an assertion and take the card off-line.
CVSS Base Score: 5.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/138955&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2018-18559 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a use-after-free when there is an incomplete fix for a race condition between fanout_add from setsockopt and bind on an AF_PACKET socket. By sending a specially crafted packet, a remote attacker could exploit this vulnerability to achieve Program Counter control and cause the kernel to crash.
CVSS Base Score: 5.9
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/151816&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-14634 DESCRIPTION: Linux Kernel could allow a local authenticated attacker to gain elevated privileges on the system, caused by an integer overflow in the create_elf_tables function. By using a specially-crafted binary file, an attacker could exploit this vulnerability to obtain full root privileges.
CVSS Base Score: 7.8
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/150310&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-14633 DESCRIPTION: Linux Kernel is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the chap_server_compute_md5() function. If the iSCSI target to be enabled on the victim host, an attacker could overflow a buffer and execute arbitrary code on the system or cause the system to crash.
CVSS Base Score: 7
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/150238&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H)

CVEID: CVE-2018-13405 DESCRIPTION: Linux Kernel could allow a local attacker to gain elevated privileges on the system, caused by a flaw in the fs/inode.c:inode_init_owner() function. An attacker could exploit this vulnerability to create files with an unintended group ownership.
CVSS Base Score: 4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/146434&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

CVEID: CVE-2018-10940 DESCRIPTION: Linux Kernel could allow a local attacker to obtain sensitive information, caused by a flaw in the cdrom_ioctl_media_changed function in drivers/cdrom/cdrom.c. By using a specially-crafted ioctl, an attacker could exploit this vulnerability to read out kernel memory.
CVSS Base Score: 4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/143080&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2018-10883 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by an out-of-bounds write in the jbd2_journal_dirty_metadata() function. By mounting and operating on a specially crafted ext4 filesystem image, a local attacker could exploit this vulnerability to cause the system to crash.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/147830&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-10881 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by an out-of-bound access in the ext4_get_group_info function. By mounting and operating on a specially crafted ext4 filesystem image, a local attacker could exploit this vulnerability to cause the system to crash.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/147820&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-10879 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a use-after-free in the ext4_xattr_set_entry function. By renaming a file a specially crafted ext4 filesystem image, a local attacker could exploit this vulnerability to cause the system to crash.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/147832&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-10878 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by an out-of-bounds write in the ext4 filesystem. By mounting and operating on a specially crafted ext4 filesystem image, a local attacker could exploit this vulnerability to cause the system to crash.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/147833&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-8781 DESCRIPTION: Linux Kernel could allow a local attacker to execute arbitrary code on the system, caused by an integer overflow in the udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c. An attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base Score: 8.4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/142300&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-7757 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c. By performing many read accesses to files in the /sys/class/sas_phy directory, a local attacker could exploit this vulnerability to cause the system to crash.
CVSS Base Score: 4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/140138&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2018-7740 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a flaw in the resv_map_release function in mm/hugetlb.c. By using a specially-crafted application, a local attacker could exploit this vulnerability to cause the system to cause a denial of service.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/139974&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-5803 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a in the _sctp_make_chunk() function in net/sctp/sm_make_chunk.c. By sending specially-crafted SCTP packets, a local attacker could exploit this vulnerability to cause the kernel to crash.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/139740&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-5344 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a use-after-free in the drivers/block/loop.c. A local attacker could exploit this vulnerability to cause the system to crash.
CVSS Base Score: 4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/137649&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2018-1130 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a NULL pointer dereference in dccp_write_xmit() function in net/dccp/output.c. By using specially-crafted system calls, a local attacker could exploit this vulnerability to cause the system to crash.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/143153&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-1094 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a NULL pointer dereference flaw in the ext4_fill_super function in fs/ext4/super.c. By persuading a victim to open a specially-crafted file, a remote attacker could exploit this vulnerability to cause the system to crash.
CVSS Base Score: 5.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/141198&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)

CVEID: CVE-2018-1092 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a NULL pointer dereference flaw in the ext4_iget function in fs/ext4/inode.c. By persuading a victim to open a specially-crafted file, a remote attacker could exploit this vulnerability to cause the system to crash.
CVSS Base Score: 5.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/141196&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)

CVEID: CVE-2017-18344 DESCRIPTION: Linux Kernel could allow a local attacker to obtain sensitive information, caused by an out-of-bounds memory read error in the sigevent->sigev_notify’’ field of show_timer() function. An attacker could exploit this vulnerability to obtain kernel memory.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/147880&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID: CVE-2017-18232 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a deadlock in the Serial Attached SCSI (SAS) implementation. By triggering certain error-handling code, a local attacker could exploit this vulnerability to cause the system to crash.
CVSS Base Score: 4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/140428&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2017-18208 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by a flaw in the madvise_willneed function in mm/madvise.c. By triggering use of MADVISE_WILLNEED for a DAX mapping, a local attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/139764&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2017-17805 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by improper handling of zero-length inputs in the Salsa20 encryption algorithm. By using the AF_ALG-based skcipher interface (CONFIG_CRYPTO_USER_API_SKCIPHER), a local authenticated attacker could exploit this vulnerability to cause the system crash.
CVSS Base Score: 5.5
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/136626&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)

CVEID: CVE-2017-10661 DESCRIPTION: Linux Kernel could allow a local attacker to gain elevated privileges on the system, caused by a race condition in fs/timerfd.c. An attacker could exploit this vulnerability to gain privileges or cause a denial of service.
CVSS Base Score: 5.9
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/130802&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2017-0861 DESCRIPTION: Google Android could allow a remote attacker to gain elevated privileges on the system, caused by a flaw in the Upstream kernel audio driver. By persuading a victim to open a specially-crafted application, an attacker could exploit this vulnerability to gain elevated privileges on the system.
CVSS Base Score: 7.8
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/135049&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)

CVEID: CVE-2016-4913 DESCRIPTION: Linux Kernel could allow a local attacker to obtain sensitive information, caused by the improper handling of NM entries containing NUL characters by the get_rock_ridge_filename function in fs/isofs/rock.c. An attacker could exploit this vulnerability using a specially crafted isofs filesystem to read from kernel memory locations.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/113397&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID: CVE-2015-8830 DESCRIPTION: Linux Kernel could allow a remote attacker to execute arbitrary code on the system, caused by an integer overflow in the AIO interface. By applying to certain filesystems, socket or device types, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base Score: 7.3
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/111186&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVEID: CVE-2019-6974 DESCRIPTION: Linux Kernel is vulnerable to a denial of service, caused by the improper handling of reference counting by kvm_ioctl_create_device in virt/kvm/kvm_main.c. A local authenticated attacker could exploit this vulnerability to trigger a use-after-free to crash the guest VM and possibly gain privileged access to a system.
CVSS Base Score: 7.8
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/157074&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H)

CVEID: CVE-2018-17972 DESCRIPTION: Linux Kernel could allow a local attacker to obtain sensitive information, caused by a flaw in the proc_pid_stack function in fs/proc/base.c. By sending a specially-crafted request, a local attacker could exploit this vulnerability to obtain kernel task stack contents.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/150826&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID: CVE-2018-9568 DESCRIPTION: Google Android could allow a local attacker to gain elevated privileges on the system, caused by a type confusion flaw in the sk_clone_lock function in sock.c. By sending a specially-crafted request, an attacker could exploit this vulnerability to gain elevated privileges.
CVSS Base Score: 8.4
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/153889&gt; for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

PowerKVM 3.1

Remediation/Fixes

Customers can update PowerKVM systems by using “yum update”.

Fix images are made available via Fix Central. For version 3.1, see https://ibm.biz/BdHggw. This issue is addressed starting with v3.1.0.2 update 18.

Workarounds and Mitigations

none