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OVAL Definitions
>
OVAL Definition Details
Id
oval:ru.altx-soft.nix:def:145532
[Eng]
Version
1
Class
patch
ALTXid
344481
Language
Russian
Severity
Medium
Title
Обновление USN-4679-1 -- уязвимости Linux kernel
Description
It was discovered that the console keyboard driver in the Linux kernelcontained a race condition.
A local attacker could use this to exposesensitive information (kernel memory). (CVE-2020-25656)
Family
unix
Platform
Linux Mint 19.x
Linux Mint 20.x
Ubuntu 18.04
Ubuntu 20.04
Product
linux
linux-aws
linux-aws-5.4
linux-azure
linux-azure-5.4
linux-gcp
linux-gcp-5.4
linux-gke-5.4
linux-hwe-5.4
linux-kvm
linux-oracle
linux-oracle-5.4
linux-raspi
linux-raspi-5.4
Reference
VENDOR: USN-4679-1
VENDOR: USN-4679-1
Id:
USN-4679-1
Reference:
https://ubuntu.com/security/notices/USN-4679-1
CVE: CVE-2020-25656
CVE: CVE-2020-25656
Id:
CVE-2020-25656
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25656
Comment
: A flaw was found in the Linux kernel. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.
CVSSv2 Score:
1.9
Access vector:
LOCAL
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
NONE
Availability impact:
NONE
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSSv3 Score:
4.1
Attack vector:
LOCAL
Attack complexity:
HIGH
Privileges required:
HIGH
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
NONE
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
CWE:
416 (Use After Free)
References:
https://lkml.org/lkml/2020/10/29/528 (MISC)
https://lkml.org/lkml/2020/10/16/84 (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=1888726 (MISC)
[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update (MLIST)
https://www.starwindsoftware.com/security/sw-20210325-0006/ (MISC)
CVE: CVE-2020-25668
CVE: CVE-2020-25668
Id:
CVE-2020-25668
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25668
Comment
: A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font_op.
CVSSv2 Score:
6.9
Access vector:
LOCAL
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
COMPLETE
Integrity impact:
COMPLETE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSSv3 Score:
7
Attack vector:
LOCAL
Attack complexity:
HIGH
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE:
662 (Improper Synchronization)
References:
[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update (MLIST)
[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update (MLIST)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=90bfdeef83f1d6c696039b6a917190dcbbad3220 (MISC)
[oss-security] 20201104 Re: CVE-2020-25668: Linux kernel concurrency use-after-free in vt (MLIST)
[oss-security] 20201030 CVE-2020-25668: Linux kernel concurrency use-after-free in vt (MLIST)
https://security.netapp.com/advisory/ntap-20210702-0005/ (CONFIRM)
https://www.openwall.com/lists/oss-security/2020/11/04/3%2C ()
https://www.openwall.com/lists/oss-security/2020/10/30/1%2C ()
https://bugzilla.redhat.com/show_bug.cgi?id=1893287%2C ()
CVE: CVE-2020-25704
CVE: CVE-2020-25704
Id:
CVE-2020-25704
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25704
Comment
: A flaw memory leak in the Linux kernel performance monitoring subsystem was found in the way if using PERF_EVENT_IOC_SET_FILTER. A local user could use this flaw to starve the resources causing denial of service.
CVSSv2 Score:
4.9
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:N/I:N/A:C
CVSSv3 Score:
5.5
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE:
401 (Improper Release of Memory Before Removing Last Reference ('Memory Leak'))
References:
https://bugzilla.redhat.com/show_bug.cgi?id=1895961 (MISC)
https://www.openwall.com/lists/oss-security/2020/11/09/1 (MISC)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7bdb157cdebbf95a1cd94ed2e01b338714075d00 (MISC)
[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update (MLIST)
https://www.starwindsoftware.com/security/sw-20220802-0003/ (MISC)
CVE: CVE-2020-27675
CVE: CVE-2020-27675
Id:
CVE-2020-27675
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27675
Comment
: An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5.
CVSSv2 Score:
4.7
Access vector:
LOCAL
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:N/I:N/A:C
CVSSv3 Score:
4.7
Attack vector:
LOCAL
Attack complexity:
HIGH
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE:
362 (Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'))
References:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073d0552ead5bfc7a3a9c01de590e924f11b5dd2 (MISC)
https://github.com/torvalds/linux/commit/073d0552ead5bfc7a3a9c01de590e924f11b5dd2 (MISC)
https://xenbits.xen.org/xsa/advisory-331.html (MISC)
GLSA-202011-06 (GENTOO)
[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update (MLIST)
[oss-security] 20210119 Xen Security Advisory 331 v3 (CVE-2020-27675) - Race condition in Linux event handler may crash dom0 (MLIST)
FEDORA-2020-474d747b60 ()
FEDORA-2020-09e4d062fe ()
FEDORA-2020-920a258c79 ()
CVE: CVE-2020-27777
CVE: CVE-2020-27777
Id:
CVE-2020-27777
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27777
Comment
: A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel.
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:
862 (Missing Authorization)
References:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=next&id=bd59380c5ba4147dcbaad3e582b55ccfd120b764 (MISC)
https://www.openwall.com/lists/oss-security/2020/11/23/2 (MISC)
https://www.openwall.com/lists/oss-security/2020/10/09/1 (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=1900844 (MISC)
CVE: CVE-2020-28974
CVE: CVE-2020-28974
Id:
CVE-2020-28974
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28974
Comment
: A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.
CVSSv2 Score:
6.1
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
PARTIAL
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:P/I:P/A:C
CVSSv3 Score:
5
Attack vector:
PHYSICAL
Attack complexity:
LOW
Privileges required:
HIGH
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
LOW
Integrity impact:
LOW
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:H
CWE:
125 (Out-of-bounds Read)
References:
https://seclists.org/oss-sec/2020/q4/104 (MISC)
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7 (MISC)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804 (MISC)
[oss-security] 20201124 Re: Linux kernel slab-out-of-bounds Read in fbcon (MLIST)
[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update (MLIST)
https://security.netapp.com/advisory/ntap-20210108-0003/ (CONFIRM)
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