CVE-2023-52628
netfilter: nftables: exthdr: fix 4-byte stack OOB write
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nftables: exthdr: fix 4-byte stack OOB write If priv->len is a multiple of 4, then dst[len / 4] can write past the destination array which leads to stack corruption. This construct is necessary to clean the remainder of the register in case ->len is NOT a multiple of the register size, so make it conditional just like nft_payload.c does. The bug was added in 4.1 cycle and then copied/inherited when tcp/sctp and ip option support was added. Bug reported by Zero Day Initiative project (ZDI-CAN-21950, ZDI-CAN-21951, ZDI-CAN-21961).
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
4.1
References 7
git.kernel.org
- stable/c/28a97c43c9e32f437ebb8d6126f9bb7f3ca9521a
- stable/c/cf39c4f77a773a547ac2bcf30ecdd303bb0c80cb
- stable/c/a7d86a77c33ba1c357a7504341172cc1507f0698
- stable/c/1ad7b189cc1411048434e8595ffcbe7873b71082
- stable/c/d9ebfc0f21377690837ebbd119e679243e0099cc
- stable/c/c8f292322ff16b9a2272a67de396c09a50e09dce
- stable/c/fd94d9dadee58e09b49075240fe83423eb1dcd36