CVE-2023-48706

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CVE-2023-48706

Summary: Vim has heap-use-after-free at /src/charset.c:1770:12 in skipwhite

Details: Vim is a UNIX editor that, prior to version 9.0.2121, has a heap-use-after-free vulnerability. When executing a `:s` command for the very first time and using a sub-replace-special atom inside the substitution part, it is possible that the recursive `:s` call causes free-ing of memory which may later then be accessed by the initial `:s` command. The user must intentionally execute the payload and the whole process is a bit tricky to do since it seems to work only reliably for the very first :s command. It may also cause a crash of Vim. Version 9.0.2121 contains a fix for this issue.

References: http://www.openwall.com/lists/oss-security/2023/11/22/3, https://github.com/gandalf4a/crash_report/blob/main/vim/vim_huaf, https://lists.fedoraproject.org/archives/list/[email protected]/message/DNMFS3IH74KEMMESOA3EOB6MZ56TWGFF/, https://lists.fedoraproject.org/archives/list/[email protected]/message/IVA7K73WHQH4KVFDJQ7ELIUD2WK5ZT5E/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48706.json, https://github.com/vim/vim/security/advisories/GHSA-c8qm-x72m-q53q, https://nvd.nist.gov/vuln/detail/CVE-2023-48706, https://security.netapp.com/advisory/ntap-20240105-0001/, https://github.com/vim/vim/commit/26c11c56888d01e298cd8044caf860f3c26f57bb, https://github.com/vim/vim/pull/13552