ghsa-j6v3-2c6w-pwpm
Vulnerability from github
Published
2022-07-20 00:00
Modified
2022-07-27 00:00
Severity ?
Details
DOS / potential heap overwrite in mkv demuxing using bzip decompression. Integer overflow in matroskademux element in bzip decompression function which causes a segfault, or could cause a heap overwrite, depending on libc and OS. Depending on the libc used, and the underlying OS capabilities, it could be just a segfault or a heap overwrite. If the libc uses mmap for large chunks, and the OS supports mmap, then it is just a segfault (because the realloc before the integer overflow will use mremap to reduce the size of the chunk, and it will start to write to unmapped memory). However, if using a libc implementation that does not use mmap, or if the OS does not support mmap while using libc, then this could result in a heap overwrite.
{ "affected": [], "aliases": [ "CVE-2022-1923" ], "database_specific": { "cwe_ids": [ "CWE-122", "CWE-190", "CWE-787" ], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2022-07-19T20:15:00Z", "severity": "HIGH" }, "details": "DOS / potential heap overwrite in mkv demuxing using bzip decompression. Integer overflow in matroskademux element in bzip decompression function which causes a segfault, or could cause a heap overwrite, depending on libc and OS. Depending on the libc used, and the underlying OS capabilities, it could be just a segfault or a heap overwrite. If the libc uses mmap for large chunks, and the OS supports mmap, then it is just a segfault (because the realloc before the integer overflow will use mremap to reduce the size of the chunk, and it will start to write to unmapped memory). However, if using a libc implementation that does not use mmap, or if the OS does not support mmap while using libc, then this could result in a heap overwrite.", "id": "GHSA-j6v3-2c6w-pwpm", "modified": "2022-07-27T00:00:31Z", "published": "2022-07-20T00:00:18Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-1923" }, { "type": "WEB", "url": "https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/1225" }, { "type": "WEB", "url": "https://lists.debian.org/debian-lts-announce/2022/08/msg00001.html" }, { "type": "WEB", "url": "https://www.debian.org/security/2022/dsa-5204" } ], "schema_version": "1.4.0", "severity": [ { "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "type": "CVSS_V3" } ] }
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.