Out-of-bounds Read Affecting kernel-debuginfo package, versions <0:4.14.318-240.529.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNELDEBUGINFO-5740572
- published 27 Jun 2023
- disclosed 31 May 2023
Introduced: 31 May 2023
CVE-2023-34256 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel-debuginfo to version 0:4.14.318-240.529.amzn2 or higher.
This issue was patched in ALAS2-2023-2100.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debuginfo package and not the kernel-debuginfo package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
An issue was discovered in the Linux kernel before 6.3.3. There is an out-of-bounds read in crc16 in lib/crc16.c when called from fs/ext4/super.c because ext4_group_desc_csum does not properly check an offset. NOTE: this is disputed by third parties because the kernel is not intended to defend against attackers with the stated "When modifying the block device while it is mounted by the filesystem" access.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-34256
- https://bugzilla.suse.com/show_bug.cgi?id=1211895
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.3
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4f04351888a83e595571de672e0a4a8b74f4fb31
- https://syzkaller.appspot.com/bug?extid=8785e41224a3afd04321
- https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html