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{"id": "RHSA-2017:0932", "vendorId": null, "type": "redhat", "bulletinFamily": "unix", "title": "(RHSA-2017:0932) Important: kernel-rt security and bug fix update", "description": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\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, Important)\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, Important)\n\n* A flaw was found in the Linux kernel key management subsystem in which a local attacker could crash the kernel or corrupt the stack and additional memory (denial of service) by supplying a specially crafted RSA key. This flaw panics the machine during the verification of the RSA key. (CVE-2016-8650, Moderate)\n\n* A flaw was found in the Linux kernel's implementation of setsockopt for the SO_{SND|RCV}BUFFORCE setsockopt() system call. Users with non-namespace CAP_NET_ADMIN are able to trigger this call and create a situation in which the sockets sendbuff data size could be negative. This could adversely affect memory allocations and create situations where the system could crash or cause memory corruption. (CVE-2016-9793, Moderate)\n\n* A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory. (CVE-2017-2618, Moderate)\n\nRed Hat would like to thank Alexander Popov for reporting CVE-2017-2636; Andrey Konovalov (Google) for reporting CVE-2017-6074; and Ralf Spenneberg for reporting CVE-2016-8650. The CVE-2017-2618 issue was discovered by Paul Moore (Red Hat Engineering).\n\nBug Fix(es):\n\n* The kernel-rt packages have been upgraded to version 3.10.0-514.rt56.219, which provides a number of bug fix updates over the previous version. (BZ#1429613)", "published": "2017-04-12T10:32:45", "modified": "2018-06-07T14:14:51", "epss": [{"cve": "CVE-2016-8650", "epss": 0.00042, "percentile": 0.05686, "modified": "2023-05-25"}, {"cve": "CVE-2016-9793", "epss": 0.00045, "percentile": 0.1261, "modified": "2023-05-25"}, {"cve": "CVE-2017-2618", "epss": 0.00045, "percentile": 0.12393, "modified": "2023-05-25"}, {"cve": "CVE-2017-2636", "epss": 0.00044, "percentile": 0.08335, "modified": "2023-05-25"}, {"cve": "CVE-2017-6074", "epss": 0.00043, "percentile": 0.0759, "modified": "2023-05-25"}], "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}, "cvss2": {"cvssV2": {"version": "2.0", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "accessVector": "LOCAL", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "baseScore": 7.2}, "severity": "HIGH", "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "cvss3": {"cvssV3": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}, "href": "https://access.redhat.com/errata/RHSA-2017:0932", "reporter": "RedHat", "references": [], "cvelist": ["CVE-2016-8650", "CVE-2016-9793", "CVE-2017-2618", "CVE-2017-2636", "CVE-2017-6074"], "immutableFields": [], "lastseen": "2023-05-25T16:21:22", "viewCount": 52, "enchantments": {"score": {"value": 7.1, "vector": "NONE"}, "dependencies": {"references": [{"type": "amazon", "idList": ["ALAS-2017-782", "ALAS-2017-805"]}, {"type": "androidsecurity", "idList": ["ANDROID:2017-03-01", "ANDROID:2017-07-01"]}, {"type": "archlinux", "idList": ["ASA-201702-17", "ASA-201702-18", "ASA-201703-13", "ASA-201703-6", "ASA-201703-7", "ASA-201703-8"]}, {"type": "avleonov", "idList": ["AVLEONOV:258C4C7C6D4C10965793FFCDA8860939"]}, {"type": "centos", "idList": ["CESA-2017:0293", "CESA-2017:0294", "CESA-2017:0323", "CESA-2017:0892", "CESA-2017:0933", "CESA-2018:1854"]}, {"type": "cloudfoundry", "idList": ["CFOUNDRY:10916BBD941416F67134F1200DE97709", "CFOUNDRY:59BA3F002F833C86F9D716E2A3575DCB", "CFOUNDRY:EC22D7C9EDB0A72523F94F026F02A4D4"]}, {"type": "cve", "idList": ["CVE-2016-8650", "CVE-2016-9793", "CVE-2017-2618", "CVE-2017-2636", "CVE-2017-6074"]}, {"type": "debian", "idList": ["DEBIAN:DLA-772-1:EB721", "DEBIAN:DLA-833-1:91DAA", "DEBIAN:DLA-849-1:12807", "DEBIAN:DSA-3791-1:0D4D5", "DEBIAN:DSA-3791-1:AE0FD", "DEBIAN:DSA-3804-1:0976E", "DEBIAN:DSA-3804-1:E7F94"]}, {"type": "debiancve", "idList": ["DEBIANCVE:CVE-2016-8650", "DEBIANCVE:CVE-2016-9793", 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"RHSA-2017:0346", "RHSA-2017:0347", "RHSA-2017:0365", "RHSA-2017:0366", "RHSA-2017:0403", "RHSA-2017:0501", "RHSA-2017:0892", "RHSA-2017:0931", "RHSA-2017:0933", "RHSA-2017:0986", "RHSA-2017:1125", "RHSA-2017:1126", "RHSA-2017:1209", "RHSA-2017:1232", "RHSA-2017:1233", "RHSA-2017:1488", "RHSA-2018:1854"]}, {"type": "redhatcve", "idList": ["RH:CVE-2016-8650", "RH:CVE-2016-9793", "RH:CVE-2017-2618", "RH:CVE-2017-2636"]}, {"type": "seebug", "idList": ["SSV:92700", "SSV:92755"]}, {"type": "suse", "idList": ["OPENSUSE-SU-2017:0456-1", "OPENSUSE-SU-2017:0458-1", "OPENSUSE-SU-2017:0541-1", "OPENSUSE-SU-2017:0547-1", "OPENSUSE-SU-2017:0906-1", "OPENSUSE-SU-2017:0907-1", "SUSE-SU-2017:0181-1", "SUSE-SU-2017:0333-1", "SUSE-SU-2017:0407-1", "SUSE-SU-2017:0437-1", "SUSE-SU-2017:0464-1", "SUSE-SU-2017:0471-1", "SUSE-SU-2017:0494-1", "SUSE-SU-2017:0864-1", "SUSE-SU-2017:0865-1", "SUSE-SU-2017:0866-1", "SUSE-SU-2017:0912-1", "SUSE-SU-2017:0913-1", "SUSE-SU-2017:1102-1", "SUSE-SU-2017:1183-1", 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"USN-3422-1", "USN-3422-2"]}, {"type": "ubuntucve", "idList": ["UB:CVE-2016-8650", "UB:CVE-2016-9793", "UB:CVE-2017-2618", "UB:CVE-2017-2636", "UB:CVE-2017-6074"]}, {"type": "veracode", "idList": ["VERACODE:12299", "VERACODE:12418", "VERACODE:12432", "VERACODE:17860", "VERACODE:17861"]}, {"type": "virtuozzo", "idList": ["VZA-2017-016", "VZA-2017-017", "VZA-2017-028", "VZA-2017-029", "VZA-2018-040", "VZA-2018-041"]}, {"type": "zdt", "idList": ["1337DAY-ID-27133", "1337DAY-ID-27134", "1337DAY-ID-27764"]}]}, "backreferences": {"references": [{"type": "amazon", "idList": ["ALAS-2017-782"]}, {"type": "archlinux", "idList": ["ASA-201702-17", "ASA-201703-6", "ASA-201703-7", "ASA-201703-8"]}, {"type": "avleonov", "idList": ["AVLEONOV:258C4C7C6D4C10965793FFCDA8860939"]}, {"type": "centos", "idList": ["CESA-2017:0293", "CESA-2017:0294", "CESA-2017:0323", "CESA-2017:0933"]}, {"type": "cloudfoundry", "idList": ["CFOUNDRY:10916BBD941416F67134F1200DE97709", "CFOUNDRY:59BA3F002F833C86F9D716E2A3575DCB", "CFOUNDRY:EC22D7C9EDB0A72523F94F026F02A4D4"]}, {"type": "cve", "idList": ["CVE-2016-8650", "CVE-2016-9793", "CVE-2017-2636", "CVE-2017-6074"]}, {"type": "debian", "idList": ["DEBIAN:DLA-849-1:12807", "DEBIAN:DSA-3791-1:AE0FD", "DEBIAN:DSA-3804-1:E7F94"]}, {"type": "debiancve", "idList": ["DEBIANCVE:CVE-2016-8650", "DEBIANCVE:CVE-2016-9793", "DEBIANCVE:CVE-2017-2618", "DEBIANCVE:CVE-2017-2636", "DEBIANCVE:CVE-2017-6074"]}, {"type": "exploitdb", "idList": ["EDB-ID:41457", "EDB-ID:41458"]}, {"type": "exploitpack", "idList": ["EXPLOITPACK:4EEB4BE9E101A3B6E5FA4A3FC9B06CCD"]}, {"type": "f5", "idList": ["F5:K82508682"]}, {"type": "fedora", "idList": ["FEDORA:15EF260C76C3", "FEDORA:1F466601E823", "FEDORA:4A07160A7574", "FEDORA:6437E61257FA", "FEDORA:9D83A60EFF4F", "FEDORA:B83986079D12", "FEDORA:C26AE605FC27", "FEDORA:E878E60F237D"]}, {"type": "hackerone", "idList": ["H1:347282"]}, {"type": "ibm", "idList": ["3225590ACA91E6DF0E178DA31C2E57BF8B7009899CBDD520B86DCF5F0582D254"]}, {"type": "kitploit", "idList": ["KITPLOIT:4462385753504235463"]}, {"type": "lenovo", "idList": ["LENOVO:PS500107-NOSID"]}, {"type": "metasploit", "idList": ["MSF:ILITIES/CISCO-SA-20160914-IOS/"]}, {"type": "myhack58", "idList": ["MYHACK58:62201783679", "MYHACK58:62201783692"]}, {"type": "nessus", "idList": ["ALA_ALAS-2017-782.NASL", "CENTOS_RHSA-2017-0293.NASL", "CENTOS_RHSA-2017-0294.NASL", "CENTOS_RHSA-2017-0323.NASL", "DEBIAN_DLA-849.NASL", "DEBIAN_DSA-3791.NASL", "DEBIAN_DSA-3804.NASL", "EULEROS_SA-2017-1056.NASL", "EULEROS_SA-2017-1057.NASL", "EULEROS_SA-2017-1066.NASL", "EULEROS_SA-2017-1071.NASL", "EULEROS_SA-2017-1072.NASL", "FEDORA_2016-107F03CC00.NASL", "FEDORA_2016-5AFF4A6BBC.NASL", "FEDORA_2016-5CB5B4082D.NASL", "FEDORA_2016-6AFDD2B61D.NASL", "FEDORA_2016-A820774FC2.NASL", "FEDORA_2016-B18410C59C.NASL", "FEDORA_2017-2E1F3694B2.NASL", "FEDORA_2017-387FF46A66.NASL", "FEDORA_2017-4B9F61C68D.NASL", "FEDORA_2017-F519EBB3C4.NASL", "OPENSUSE-2017-286.NASL", "OPENSUSE-2017-287.NASL", "ORACLELINUX_ELSA-2016-3648.NASL", "ORACLELINUX_ELSA-2016-3651.NASL", "ORACLELINUX_ELSA-2017-0293.NASL", "ORACLELINUX_ELSA-2017-0294.NASL", "ORACLELINUX_ELSA-2017-0323.NASL", "ORACLELINUX_ELSA-2017-3520.NASL", "ORACLELINUX_ELSA-2017-3521.NASL", "ORACLELINUX_ELSA-2017-3522.NASL", "ORACLEVM_OVMSA-2016-0174.NASL", "ORACLEVM_OVMSA-2016-0175.NASL", "ORACLEVM_OVMSA-2017-0044.NASL", "ORACLEVM_OVMSA-2017-0045.NASL", "ORACLEVM_OVMSA-2017-0046.NASL", "REDHAT-RHSA-2017-0293.NASL", "REDHAT-RHSA-2017-0294.NASL", "REDHAT-RHSA-2017-0295.NASL", "REDHAT-RHSA-2017-0316.NASL", "REDHAT-RHSA-2017-0323.NASL", "REDHAT-RHSA-2017-0324.NASL", "REDHAT-RHSA-2017-0345.NASL", "REDHAT-RHSA-2017-0346.NASL", "REDHAT-RHSA-2017-0347.NASL", "REDHAT-RHSA-2017-0365.NASL", "REDHAT-RHSA-2017-0366.NASL", "REDHAT-RHSA-2017-0403.NASL", "REDHAT-RHSA-2017-0501.NASL", "REDHAT-RHSA-2017-0986.NASL", "REDHAT-RHSA-2017-1125.NASL", "REDHAT-RHSA-2017-1126.NASL", "SL_20170222_KERNEL_ON_SL6_X.NASL", "SL_20170222_KERNEL_ON_SL7_X.NASL", "SL_20170224_KERNEL_ON_SL5_X.NASL", "UBUNTU_USN-3168-1.NASL", "UBUNTU_USN-3168-2.NASL", "UBUNTU_USN-3169-1.NASL", "UBUNTU_USN-3169-2.NASL", "UBUNTU_USN-3169-3.NASL", "UBUNTU_USN-3169-4.NASL", "UBUNTU_USN-3170-1.NASL", "UBUNTU_USN-3170-2.NASL", "UBUNTU_USN-3208-1.NASL", "UBUNTU_USN-3208-2.NASL", "UBUNTU_USN-3209-1.NASL", "UBUNTU_USN-3218-1.NASL", "UBUNTU_USN-3219-1.NASL", "UBUNTU_USN-3219-2.NASL", "UBUNTU_USN-3220-1.NASL", "UBUNTU_USN-3220-2.NASL", "UBUNTU_USN-3220-3.NASL", "UBUNTU_USN-3221-1.NASL", "UBUNTU_USN-3221-2.NASL", "VIRTUOZZO_VZA-2017-029.NASL"]}, {"type": "openvas", "idList": ["OPENVAS:1361412562310871917", "OPENVAS:1361412562310872042", "OPENVAS:1361412562310872076", "OPENVAS:1361412562310872131", "OPENVAS:1361412562310872137", "OPENVAS:1361412562310872147"]}, {"type": "oraclelinux", "idList": ["ELSA-2016-3648", "ELSA-2016-3651", "ELSA-2017-0293", "ELSA-2017-0294", "ELSA-2017-0294-1", "ELSA-2017-0323", "ELSA-2017-0323-1", "ELSA-2017-3520", "ELSA-2017-3521", "ELSA-2017-3522"]}, {"type": "packetstorm", "idList": ["PACKETSTORM:141331", "PACKETSTORM:141339"]}, {"type": "photon", "idList": ["PHSA-2017-0026", "PHSA-2017-0031"]}, {"type": "ptsecurity", "idList": ["PT-2017-06"]}, {"type": "redhat", "idList": ["RHSA-2017:0293", "RHSA-2017:0294", "RHSA-2017:0316", "RHSA-2017:0323", "RHSA-2017:0324", "RHSA-2017:0345", "RHSA-2017:0346", "RHSA-2017:0365", "RHSA-2017:0366", "RHSA-2017:0403", "RHSA-2017:1125"]}, {"type": "redhatcve", "idList": ["RH:CVE-2016-8650", "RH:CVE-2016-9793", "RH:CVE-2017-2618", "RH:CVE-2017-2636"]}, {"type": "seebug", "idList": ["SSV:92700"]}, {"type": "suse", "idList": ["OPENSUSE-SU-2017:0541-1", "OPENSUSE-SU-2017:0547-1"]}, {"type": "thn", "idList": ["THN:11E7CC33794D9968747131F3F0AE8716", "THN:FA88848EF7446185D7481A0AB338ACA7"]}, {"type": "threatpost", "idList": ["THREATPOST:178E0668804E2DA1322D2C1DCF6CA893"]}, {"type": "ubuntu", "idList": ["USN-3168-1", "USN-3169-2", "USN-3169-4", "USN-3170-1", "USN-3208-2", "USN-3209-1", "USN-3219-1", "USN-3220-1", "USN-3220-2", "USN-3221-2", "USN-3381-1", "USN-3381-2"]}, {"type": "ubuntucve", "idList": ["UB:CVE-2016-8650", "UB:CVE-2016-9793", "UB:CVE-2017-2618", "UB:CVE-2017-2636", "UB:CVE-2017-6074"]}, {"type": "virtuozzo", "idList": ["VZA-2017-016", "VZA-2017-028", "VZA-2017-029"]}, {"type": "zdt", "idList": ["1337DAY-ID-27133", "1337DAY-ID-27134", "1337DAY-ID-27764"]}]}, "exploitation": null, "epss": [{"cve": "CVE-2016-8650", "epss": 0.00042, "percentile": 0.05667, "modified": "2023-05-06"}, {"cve": "CVE-2016-9793", "epss": 0.00045, "percentile": 0.12489, "modified": "2023-05-06"}, {"cve": "CVE-2017-2618", "epss": 0.00045, "percentile": 0.12286, "modified": "2023-05-06"}, {"cve": "CVE-2017-2636", "epss": 0.00044, "percentile": 0.0825, "modified": "2023-05-06"}, {"cve": "CVE-2017-6074", "epss": 0.00043, "percentile": 0.07492, "modified": "2023-05-06"}], "vulnersScore": 7.1}, "_state": {"dependencies": 1685041688, "score": 1685032334, "epss": 0}, "_internal": {"score_hash": "8ac071a59dc1aa0d6c195dc23cbb1701"}, "affectedPackage": [{"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt"}, {"OS": "RedHat", "OSVersion": "6", "arch": "src", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-3.10.0-514.rt56.219.el6rt.src.rpm", "operator": "lt", "packageName": "kernel-rt"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-devel-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-devel"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-debug-debuginfo-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-debug-debuginfo"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-debuginfo-common-x86_64-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-debuginfo-common-x86_64"}, {"OS": "RedHat", "OSVersion": "6", "arch": "noarch", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-firmware-3.10.0-514.rt56.219.el6rt.noarch.rpm", "operator": "lt", "packageName": "kernel-rt-firmware"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-vanilla-debuginfo-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-vanilla-debuginfo"}, {"OS": "RedHat", "OSVersion": "6", "arch": "noarch", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-doc-3.10.0-514.rt56.219.el6rt.noarch.rpm", "operator": "lt", "packageName": "kernel-rt-doc"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-vanilla-devel-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-vanilla-devel"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-debug-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-debug"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-debuginfo-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-debuginfo"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-debug-devel-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-debug-devel"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-trace-debuginfo-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-trace-debuginfo"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-trace-devel-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-trace-devel"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-trace-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-trace"}, {"OS": "RedHat", "OSVersion": "6", "arch": "x86_64", "packageVersion": "3.10.0-514.rt56.219.el6rt", "packageFilename": "kernel-rt-vanilla-3.10.0-514.rt56.219.el6rt.x86_64.rpm", "operator": "lt", "packageName": "kernel-rt-vanilla"}], "vendorCvss": {"severity": "important"}}

{"nessus": [{"lastseen": "2023-05-18T14:11:38", "description": "An update for kernel-rt is now available for Red Hat Enterprise MRG 2.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.\n\nThe kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es) :\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.\n(CVE-2017-2636, Important)\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, Important)\n\n* A flaw was found in the Linux kernel key management subsystem in which a local attacker could crash the kernel or corrupt the stack and additional memory (denial of service) by supplying a specially crafted RSA key. This flaw panics the machine during the verification of the RSA key. (CVE-2016-8650, Moderate)\n\n* A flaw was found in the Linux kernel's implementation of setsockopt for the SO_{SND|RCV}BUFFORCE setsockopt() system call. Users with non-namespace CAP_NET_ADMIN are able to trigger this call and create a situation in which the sockets sendbuff data size could be negative.\nThis could adversely affect memory allocations and create situations where the system could crash or cause memory corruption.\n(CVE-2016-9793, Moderate)\n\n* A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory. (CVE-2017-2618, Moderate)\n\nRed Hat would like to thank Alexander Popov for reporting CVE-2017-2636; Andrey Konovalov (Google) for reporting CVE-2017-6074;\nand Ralf Spenneberg for reporting CVE-2016-8650. The CVE-2017-2618 issue was discovered by Paul Moore (Red Hat Engineering).\n\nBug Fix(es) :\n\n* The kernel-rt packages have been upgraded to version 3.10.0-514.rt56.219, which provides a number of bug fix updates over the previous version. 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(CVE-2016-8650)\n\n - The sctp_sf_ootb function in net/sctp/sm_statefuns.c in the Linux kernel before 4.8.8 lacks chunk-length\n checking for the first chunk, which allows remote attackers to cause a denial of service (out-of-bounds\n slab access) or possibly have unspecified other impact via crafted SCTP data. 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