| Name | CVE-2021-45340 |
| Description | In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1004377, 1124956 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libsixel (PTS) | bullseye | 1.8.6-2 | vulnerable |
| bookworm | 1.10.3-3 | vulnerable |
| forky, sid, trixie | 1.10.5-1 | fixed |
| libstb (PTS) | bullseye | 0.0~git20200713.b42009b+ds-1 | vulnerable |
| bookworm | 0.0~git20220908.8b5f1f3+ds-1 | vulnerable |
| trixie | 0.0~git20241109.5c20573+ds-1 | vulnerable |
| forky, sid | 0.0~git20250907.fede005+ds-1 | vulnerable |
The information below is based on the following data on fixed versions.
Notes
[bookworm] - libsixel <ignored> (Minor issue)
[bullseye] - libsixel <no-dsa> (Minor issue)
[buster] - libsixel <no-dsa> (Minor issue)
[stretch] - libsixel <no-dsa> (Minor issue)
[trixie] - libstb <no-dsa> (Minor issue)
[bookworm] - libstb <no-dsa> (Minor issue)
https://github.com/libsixel/libsixel/issues/51
Fixed by: https://github.com/libsixel/libsixel/pull/52
libsixel bundles libstb and has fixed this issue, but a patch in src:libstb is missing:
https://github.com/saitoha/libsixel/commit/1c58a6ea708b6fa793ffb5a10798ccfea36e8eed (v1.8.7)