CVE-2024-50251: netfilter: nft_payload: sanitize offset and length before calling skb_checksum()
First published: Sat Nov 09 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_payload: sanitize offset and length before calling skb_checksum() If access to offset + length is larger than the skbuff length, then skb_checksum() triggers BUG_ON(). skb_checksum() internally subtracts the length parameter while iterating over skbuff, BUG_ON(len) at the end of it checks that the expected length to be included in the checksum calculation is fully consumed.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.5<4.19.323 | |
| Linux Kernel | >=4.20<5.4.285 | |
| Linux Kernel | >=5.5<5.10.229 | |
| Linux Kernel | >=5.11<5.15.171 | |
| Linux Kernel | >=5.16<6.1.116 | |
| Linux Kernel | >=6.2<6.6.60 | |
| Linux Kernel | >=6.7<6.11.7 | |
| Linux Kernel | =6.12-rc1 | |
| Linux Kernel | =6.12-rc2 | |
| Linux Kernel | =6.12-rc3 | |
| Linux Kernel | =6.12-rc4 | |
| Linux Kernel | =6.12-rc5 | |
| debian/linux | <=5.10.223-1 | 5.10.234-1 6.1.129-1 6.1.128-1 6.12.21-1 |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
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Reference Links
- https://git.kernel.org/stable/c/a661ed364ae6ae88c2fafa9ddc27df1af2a73701
- https://git.kernel.org/stable/c/ac7df3fc80fc82bcc3b1e8f6ebc0d2c435d0c534
- https://git.kernel.org/stable/c/e3e608cbad376674d19a71ccd0d41804d9393f02
- https://git.kernel.org/stable/c/b1d2de8a669fa14c499a385e056944d5352b3b40
- https://git.kernel.org/stable/c/d3217323525f7596427124359e76ea0d8fcc9874
- https://git.kernel.org/stable/c/0ab3be58b45b996764aba0187b46de19b3e58a72
- https://git.kernel.org/stable/c/c43e0ea848e7b9bef7a682cbc5608022d6d29d7b
- https://git.kernel.org/stable/c/d5953d680f7e96208c29ce4139a0e38de87a57fe
- https://lore.kernel.org/linux-cve-announce/2024110937-CVE-2024-50251-66dc@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:10939
- https://bugzilla.redhat.com/show_bug.cgi?id=2324886
- https://launchpad.net/bugs/cve/CVE-2024-50251
- https://github.com/slavin-ayu/CVE-2024-50251-PoC
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-50251
- https://nvd.nist.gov/vuln/detail/CVE-2024-50251
- https://security-tracker.debian.org/tracker/CVE-2024-50251
- https://ubuntu.com/security/CVE-2024-50251
- https://git.kernel.org/linus/d5953d680f7e96208c29ce4139a0e38de87a57fe
Frequently Asked Questions
What is the severity of CVE-2024-50251?
CVE-2024-50251 is categorized as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2024-50251?
To fix CVE-2024-50251, update the Linux kernel to a version that is not affected by the vulnerability.
What versions of the Linux kernel are affected by CVE-2024-50251?
CVE-2024-50251 affects various Linux kernel versions including 4.5 through 4.19.323, and several versions up to and including 6.12-rc5.
What does CVE-2024-50251 vulnerability impact?
CVE-2024-50251 impacts the netfilter subsystem's handling of offsets and lengths in the Linux kernel, potentially leading to security issues.
Can CVE-2024-50251 be exploited remotely?
Yes, CVE-2024-50251 could potentially be exploited if an attacker can manipulate the packets being processed through netfilter in the affected Linux kernel versions.
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