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OVAL Definitions
>
OVAL Definition Details
Id
oval:com.altx-soft.nix:def:124814
[Rus]
Version
3
Class
patch
ALTXid
313333
Language
English
Severity
High
Title
RHSA-2020:0027 -- kpatch-patch security update
Description
Kernel: KVM: OOB memory access via mmio ring buffer (CVE-2019-14821)
kernel: local attacker can trigger multiple use-after-free conditions results in privilege escalation (CVE-2019-15239)
Family
unix
Platform
Red Hat Enterprise Linux 7
Product
kpatch-patch-3_10_0-1062
kpatch-patch-3_10_0-1062_1_1
kpatch-patch-3_10_0-1062_1_2
kpatch-patch-3_10_0-1062_4_1
kpatch-patch-3_10_0-1062_4_2
kpatch-patch-3_10_0-1062_4_3
Reference
VENDOR: RHSA-2020:0027
VENDOR: RHSA-2020:0027
Id:
RHSA-2020:0027
Reference:
https://access.redhat.com/errata/RHSA-2020:0027
CVE: CVE-2019-14821
CVE: CVE-2019-14821
Id:
CVE-2019-14821
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14821
Comment
: An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.
CVSSv2 Score:
7.2
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
COMPLETE
Integrity impact:
COMPLETE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSSv3 Score:
8.8
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
CHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE:
787 (Out-of-bounds Write)
References:
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821 (CONFIRM)
[oss-security] 20190920 CVE-2019-14821 Kernel: KVM: OOB memory access via mmio ring buffer (MLIST)
DSA-4531 (DEBIAN)
20190925 [SECURITY] [DSA 4531-1] linux security update (BUGTRAQ)
[debian-lts-announce] 20190925 [SECURITY] [DLA 1930-1] linux security update (MLIST)
[debian-lts-announce] 20191001 [SECURITY] [DLA 1940-1] linux-4.9 security update (MLIST)
https://security.netapp.com/advisory/ntap-20191004-0001/ (CONFIRM)
openSUSE-SU-2019:2307 (SUSE)
openSUSE-SU-2019:2308 (SUSE)
USN-4157-1 (UBUNTU)
USN-4157-2 (UBUNTU)
USN-4162-1 (UBUNTU)
USN-4163-1 (UBUNTU)
USN-4163-2 (UBUNTU)
USN-4162-2 (UBUNTU)
http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html (MISC)
RHSA-2019:3517 (REDHAT)
RHSA-2019:3309 (REDHAT)
20191108 [slackware-security] Slackware 14.2 kernel (SSA:2019-311-01) (BUGTRAQ)
http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html (MISC)
RHSA-2019:3978 (REDHAT)
RHSA-2019:3979 (REDHAT)
RHSA-2019:4154 (REDHAT)
RHSA-2019:4256 (REDHAT)
RHSA-2020:0027 (REDHAT)
RHSA-2020:0204 (REDHAT)
N/A (N/A)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRZQQQANZWQMPILZV7OTS3RGGRLLE2Q7/ (MISC)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3QNMPENPFEGVTOFPSNOBL7JEIJS25P/ (MISC)
CVE: CVE-2019-15239
CVE: CVE-2019-15239
Id:
CVE-2019-15239
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15239
Comment
: In the Linux kernel, a certain net/ipv4/tcp_output.c change, which was properly incorporated into 4.16.12, was incorrectly backported to the earlier longterm kernels, introducing a new vulnerability that was potentially more severe than the issue that was intended to be fixed by backporting. Specifically, by adding to a write queue between disconnection and re-connection, a local attacker can trigger multiple use-after-free conditions. This can result in a kernel crash, or potentially in privilege escalation. NOTE: this affects (for example) Linux distributions that use 4.9.x longterm kernels before 4.9.190 or 4.14.x longterm kernels before 4.14.139.
CVSSv2 Score:
7.2
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
COMPLETE
Integrity impact:
COMPLETE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSSv3 Score:
7.8
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE:
416 (Use After Free)
References:
https://pulsesecurity.co.nz/advisories/linux-kernel-4.9-tcpsocketsuaf (MISC)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7f582b248d0a86bae5788c548d7bb5bca6f7691a (MISC)
https://www.debian.org/security/2019/dsa-4497 (MISC)
https://salsa.debian.org/kernel-team/kernel-sec/blob/f6273af2d956a87296b6b60379d0a186c9be4bbc/active/CVE-2019-15239 (MISC)
openSUSE-SU-2019:2173 (SUSE)
openSUSE-SU-2019:2181 (SUSE)
RHSA-2019:3978 (REDHAT)
RHSA-2019:3979 (REDHAT)
RHSA-2020:0027 (REDHAT)
https://lore.kernel.org/stable/41a61a2f87691d2bc839f26cdfe6f5ff2f51e472.camel%40decadent.org.uk/ ()
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