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Ubuntu 22.04 LTS USN-6285-1 Critical: Kernel Elevation and DoS

ubuntu
Calendar Grey August 11, 2023
Dist Ubuntu Esm H88
Security flaws in the Ubuntu 20.04 LTS kernel have been resolved through USN-6285-1, tackling concerns related to privilege escalation and memory faults.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-6.1: Linux kernel for OEM systems

Details:

It was discovered that the NTFS file system implementation in the Linux

kernel did not properly check buffer indexes in certain situations, leading

to an out-of-bounds read vulnerability. A local attacker could possibly use

this to expose sensitive information (kernel memory). (CVE-2022-48502)

Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS

implementation in the Ubuntu Linux kernel did not properly perform

permission checks in certain situations. A local attacker could possibly

use this to gain elevated privileges. (CVE-2023-2640)

It was discovered that a race condition existed in the f2fs file system in

the Linux kernel, leading to a null pointer dereference vulnerability. An

attacker could use this to construct a malicious f2fs image that, when

mounted and operated on, could cause a denial of service ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory buffer overflow critical Ubuntu Linux kernel out-of-bounds elevation

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
   linux-image-6.1.0-1019-oem      6.1.0-1019.19
   linux-image-oem-22.04c          6.1.0.1019.19

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

https://ubuntu.com/security/notices/USN-6285-1

CVE-2022-48502, CVE-2023-2640, CVE-2023-2898, CVE-2023-31248,

CVE-2023-32629, CVE-2023-3390, CVE-2023-35001, CVE-2023-3609,

CVE-2023-3610, CVE-2023-3611, CVE-2023-3776, CVE-2023-38430,

CVE-2023-38432, CVE-2023-3863

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6285-1

Topics%20covered

Topics Covered

security advisory buffer overflow critical Ubuntu Linux kernel out-of-bounds elevation

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.1/6.1.0-1019.19

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