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AUSCERT External Security Bulletin Redistribution
ESB-2022.0784
Linux kernel (OEM) vulnerabilities
23 February 2022
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AusCERT Security Bulletin Summary
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Product: Linux kernel (OEM)
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2022-24959 CVE-2022-24448 CVE-2022-0492
CVE-2022-0435 CVE-2021-44879 CVE-2021-43976
Original Bulletin:
https://ubuntu.com/security/notices/USN-5302-1
Comment: CVSS (Max): 7.1 CVE-2022-0435 (CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: Red Hat
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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USN-5302-1: Linux kernel (OEM) vulnerabilities
22 February 2022
Several security issues were fixed in the Linux kernel.
Releases
o Ubuntu 20.04 LTS
Packages
o linux-oem-5.14 - Linux kernel for OEM systems
Details
Yiqi Sun and Kevin Wang discovered that the cgroups implementation in the
Linux kernel did not properly restrict access to the cgroups v1
release_agent feature. A local attacker could use this to gain
administrative privileges. ( CVE-2022-0492 )
Brendan Dolan-Gavitt discovered that the Marvell WiFi-Ex USB device driver
in the Linux kernel did not properly handle some error conditions. A
physically proximate attacker could use this to cause a denial of service
(system crash). ( CVE-2021-43976 )
Wenqing Liu discovered that the f2fs file system implementation in the
Linux kernel did not properly validate inode types while performing garbage
collection. An attacker could use this to construct a malicious f2fs image
that, when mounted and operated on, could cause a denial of service (system
crash). ( CVE-2021-44879 )
Samuel Page discovered that the Transparent Inter-Process Communication
(TIPC) protocol implementation in the Linux kernel contained a stack-based
buffer overflow. A remote attacker could use this to cause a denial of
service (system crash) for systems that have a TIPC bearer configured.
( CVE-2022-0435 )
Lyu Tao discovered that the NFS implementation in the Linux kernel did not
properly handle requests to open a directory on a regular file. A local
attacker could use this to expose sensitive information (kernel memory).
( CVE-2022-24448 )
It was discovered that the YAM AX.25 device driver in the Linux kernel did
not properly deallocate memory in some error conditions. A local privileged
attacker could use this to cause a denial of service (kernel memory
exhaustion). ( CVE-2022-24959 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04
o linux-image-oem-20.04c - 5.14.0.1024.22
o linux-image-oem-20.04b - 5.14.0.1024.22
o linux-image-oem-20.04d - 5.14.0.1024.22
o linux-image-oem-20.04 - 5.14.0.1024.22
o linux-image-5.14.0-1024-oem - 5.14.0-1024.26
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.
References
o CVE-2022-24448
o CVE-2021-44879
o CVE-2022-0435
o CVE-2022-24959
o CVE-2022-0492
o CVE-2021-43976
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