Allocation of Resources Without Limits or Throttling The advisory has been revoked - it doesn't affect any version of package calibre (opens in a new tab)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-UBUNTU2210-CALIBRE-3070682
- published7 Dec 2021
- disclosed7 Dec 2021
Introduced: 7 Dec 2021
CVE-2021-44686 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:22.10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream calibre package and not the calibre package as distributed by Ubuntu.
calibre before 5.32.0 contains a regular expression that is vulnerable to ReDoS (Regular Expression Denial of Service) in html_preprocess_rules in ebooks/conversion/preprocess.py.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2021-44686
- https://bugs.launchpad.net/calibre/+bug/1951979
- https://github.com/dwisiswant0/advisory/issues/18
- https://github.com/kovidgoyal/calibre/compare/v5.31.1...v5.32.0
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W7QKFPYJ23KG6WJ5NIYAM4N2NWZCLQGL/
- https://lists.debian.org/debian-lts-announce/2024/09/msg00005.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W7QKFPYJ23KG6WJ5NIYAM4N2NWZCLQGL/