CVE-2024-35962 Affecting kernel-core package, versions <0:5.14.0-284.77.1.el9_2
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Test your applications- Snyk ID SNYK-RHEL9-KERNELCORE-7650210
- published 8 Aug 2024
- disclosed 20 May 2024
Introduced: 20 May 2024
CVE-2024-35962 Open this link in a new tabHow to fix?
Upgrade RHEL:9 kernel-core to version 0:5.14.0-284.77.1.el9_2 or higher.
This issue was patched in RHSA-2024:5066.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-core package and not the kernel-core package as distributed by RHEL.
See How to fix? for RHEL:9 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
netfilter: complete validation of user input
In my recent commit, I missed that do_replace() handlers use copy_from_sockptr() (which I fixed), followed by unsafe copy_from_sockptr_offset() calls.
In all functions, we can perform the @optlen validation before even calling xt_alloc_table_info() with the following check:
if ((u64)optlen < (u64)tmp.size + sizeof(tmp)) return -EINVAL;
References
- https://access.redhat.com/security/cve/CVE-2024-35962
- https://git.kernel.org/stable/c/562b7245131f6e9f1d280c8b5a8750f03edfc05c
- https://git.kernel.org/stable/c/65acf6e0501ac8880a4f73980d01b5d27648b956
- https://git.kernel.org/stable/c/89242d9584c342cb83311b598d9e6b82572eadf8
- https://git.kernel.org/stable/c/97dab36e57c64106e1c8ebd66cbf0d2d1e52d6b7
- https://git.kernel.org/stable/c/c760089aa98289b4b88a7ff5a62dd92845adf223
- https://git.kernel.org/stable/c/cf4bc359b76144a3dd55d7c09464ef4c5f2b2b05
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html