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OVAL Definitions
>
OVAL Definition Details
Id
oval:ru.altx-soft.nix:def:148332
[Eng]
Version
3
Class
patch
ALTXid
349652
Language
Russian
Severity
Medium
Title
Обновление USN-4876-1 -- уязвимости Linux kernel
Description
Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition theXen paravirt block backend in the Linux kernel, leading to a use-after-freevulnerability. An attacker in a guest VM could use this to cause a denialof service in the host OS.
Family
unix
Platform
Linux Mint 17.x
Linux Mint 18.x
Ubuntu 14.04
Ubuntu 16.04
Product
linux
linux-aws
linux-kvm
linux-lts-xenial
linux-raspi2
linux-snapdragon
Reference
VENDOR: USN-4876-1
VENDOR: USN-4876-1
Id:
USN-4876-1
Reference:
https://ubuntu.com/security/notices/USN-4876-1
CVE: CVE-2020-29569
CVE: CVE-2020-29569
Id:
CVE-2020-29569
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29569
Comment
: An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
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:
416 (Use After Free)
References:
https://xenbits.xenproject.org/xsa/advisory-350.html (MISC)
DSA-4843 (DEBIAN)
https://security.netapp.com/advisory/ntap-20210205-0001/ (CONFIRM)
[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update (MLIST)
GLSA-202107-30 (GENTOO)
CVE: CVE-2020-36158
CVE: CVE-2020-36158
Id:
CVE-2020-36158
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36158
Comment
: mwifiex_cmd_802_11_ad_hoc_start in drivers/net/wireless/marvell/mwifiex/join.c in the Linux kernel through 5.10.4 might allow remote attackers to execute arbitrary code via a long SSID value, aka CID-5c455c5ab332.
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:
6.7
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
HIGH
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE:
120 (Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'))
References:
https://github.com/torvalds/linux/commit/5c455c5ab332773464d02ba17015acdca198f03d (MISC)
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c455c5ab332773464d02ba17015acdca198f03d (MISC)
DSA-4843 (DEBIAN)
https://security.netapp.com/advisory/ntap-20210212-0002/ (CONFIRM)
[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update (MLIST)
https://patchwork.kernel.org/project/linux-wireless/patch/20201206084801.26479-1-ruc_zhangxiaohui%40163.com/ ()
https://lore.kernel.org/r/20201206084801.26479-1-ruc_zhangxiaohui%40163.com ()
FEDORA-2021-3465ada1ca ()
CVE: CVE-2021-3178
CVE: CVE-2021-3178
Id:
CVE-2021-3178
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3178
Comment
: fs/nfsd/nfs3xdr.c in the Linux kernel through 5.10.8, when there is an NFS export of a subdirectory of a filesystem, allows remote attackers to traverse to other parts of the filesystem via READDIRPLUS. NOTE: some parties argue that such a subdirectory export is not intended to prevent this attack; see also the exports(5) no_subtree_check default behavior
CVSSv2 Score:
5.5
Access vector:
NETWORK
Access complexity:
LOW
Authentication:
SINGLE
Confidentiality impact:
PARTIAL
Integrity impact:
PARTIAL
Availability impact:
NONE
CVSSv2 Vector:
AV:N/AC:L/Au:S/C:P/I:P/A:N
CVSSv3 Score:
6.5
Attack vector:
NETWORK
Attack complexity:
LOW
Privileges required:
HIGH
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CWE:
22 (Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'))
References:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6 (MISC)
[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update (MLIST)
https://patchwork.kernel.org/project/linux-nfs/patch/20210111210129.GA11652%40fieldses.org/ ()
FEDORA-2021-3bcc7198c8 ()
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