| Name | CVE-2021-44686 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3862-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| calibre (PTS) | jessie | 2.5.0+dfsg-1 | vulnerable |
| stretch | 2.75.1+dfsg-1 | vulnerable |
| buster | 3.39.1+dfsg-3 | vulnerable |
| bullseye | 5.12.0+dfsg-1+deb11u2 | vulnerable |
| bullseye (security) | 5.12.0+dfsg-1+deb11u3 | fixed |
| bookworm | 6.13.0+repack-2+deb12u4 | fixed |
| sid, trixie | 7.21.0+ds-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| calibre | source | jessie | (unfixed) | end-of-life | | |
| calibre | source | bullseye | 5.12.0+dfsg-1+deb11u3 | | DLA-3862-1 | |
| calibre | source | (unstable) | 5.33.0+dfsg-1 | | | |
Notes
[buster] - calibre <no-dsa> (Minor issue)
[stretch] - calibre <no-dsa> (Minor issue)
https://bugs.launchpad.net/calibre/+bug/1951979
https://github.com/kovidgoyal/calibre/commit/235b7e38c197ba4a3c17531e516610af8795e348 (v5.33.0)