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Ubuntu 23.04: USN-6338-2 Critical Denial Of Service Issues

ubuntu
Calendar Grey September 8, 2023
Dist Ubuntu Esm H88
Remedies for several kernel vulnerability concerns in Ubuntu versions 22.04 LTS and 23.04. Keep track of updates to strengthen system protection.
Several security issues were fixed in the Linux kernel.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 23.04 - Ubuntu 22.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-ibm: Linux kernel for IBM cloud systems - linux-oracle: Linux kernel for Oracle Cloud systems - linux-starfive: Linux kernel for StarFive processors - linux-gcp-6.2: Linux kernel for Google Cloud Platform (GCP) systems Details: Zi Fan Tan discovered that the binder IPC implementation in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-21255) 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, co...

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Topics%20covered

Topics Covered

security advisory Ubuntu kernel Denial of Service memory exhaustion system crash use-after-free

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 23.04: linux-image-6.2.0-1004-starfive 6.2.0-1004.5 linux-image-6.2.0-1009-ibm 6.2.0-1009.9 linux-image-6.2.0-1011-oracle 6.2.0-1011.11 linux-image-6.2.0-1013-gcp 6.2.0-1013.13 linux-image-gcp 6.2.0.1013.13 linux-image-ibm 6.2.0.1009.9 linux-image-oracle 6.2.0.1011.11 linux-image-starfive 6.2.0.1004.7 Ubuntu 22.04 LTS: linux-image-6.2.0-1013-gcp 6.2.0-1013.13~22.04.1 linux-image-gcp 6.2.0.1013.13~22.04.1 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-6338-2

https://ubuntu.com/security/notices/USN-6338-1

CVE-2023-21255, CVE-2023-2898, CVE-2023-31084, CVE-2023-32247,

CVE-2023-32250, CVE-2023-32252, CVE-2023-32257, CVE-2023-32258,

CVE-2023-38426, CVE-2023-38428, CVE-2023-38429

Severity
critical
Lowest
Low
Medium
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Critical

Ubuntu Security Notice USN-6338-2

Topics%20covered

Topics Covered

security advisory Ubuntu kernel Denial of Service memory exhaustion system crash use-after-free

Package Information

https://launchpad.net/ubuntu/+source/linux-gcp/6.2.0-1013.13 https://launchpad.net/ubuntu/+source/linux-ibm/6.2.0-1009.9 https://launchpad.net/ubuntu/+source/linux-oracle/6.2.0-1011.11 https://launchpad.net/ubuntu/+source/linux-starfive/6.2.0-1004.5 https://launchpad.net/ubuntu/+source/linux-gcp-6.2/6.2.0-1013.13~22.04.1

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