Out-of-bounds Write The advisory has been revoked - it doesn't affect any version of package libass (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1404-LIBASS-1320353
- published21 Jul 2021
- disclosed20 Jul 2021
Introduced: 20 Jul 2021
CVE-2020-36430 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:14.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libass package and not the libass package as distributed by Ubuntu.
libass 0.15.x before 0.15.1 has a heap-based buffer overflow in decode_chars (called from decode_font and process_text) because the wrong integer data type is used for subtraction.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2020-36430
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26674
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libass/OSV-2020-2099.yaml
- https://github.com/libass/libass/commit/017137471d0043e0321e377ed8da48e45a3ec632
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6JUXFQUJ32GWG5E46A63DFDCYJAF3VU6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6JUXFQUJ32GWG5E46A63DFDCYJAF3VU6/
- https://security.gentoo.org/glsa/202208-13