Use After Free Affecting kernel-tools package, versions <0:4.18.0-305.97.1.el8_4
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Test your applications- Snyk ID SNYK-RHEL8-KERNELTOOLS-5804503
- published 9 May 2023
- disclosed 2 May 2023
Introduced: 2 May 2023
CVE-2023-32233 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-tools to version 0:4.18.0-305.97.1.el8_4 or higher.
This issue was patched in RHSA-2023:4256.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.
References
- https://access.redhat.com/security/cve/CVE-2023-32233
- http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html
- http://www.openwall.com/lists/oss-security/2023/05/15/5
- https://bugzilla.redhat.com/show_bug.cgi?id=2196105
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1592a89942e9678f7d9c8030efa777c0d57edab
- https://github.com/torvalds/linux/commit/c1592a89942e9678f7d9c8030efa777c0d57edab
- https://lists.debian.org/debian-lts-announce/2023/06/msg00008.html
- https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
- https://news.ycombinator.com/item?id=35879660
- https://security.netapp.com/advisory/ntap-20230616-0002/
- https://www.debian.org/security/2023/dsa-5402
- https://www.openwall.com/lists/oss-security/2023/05/08/4