| Name | CVE-2020-11721 |
| Description | load_png in loader.c in libsixel.a in libsixel 1.8.6 has an uninitialized pointer leading to an invalid call to free, which can cause a denial of service. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 972641 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libsixel (PTS) | jessie | 1.1.2-1 | vulnerable |
| stretch | 1.5.2-2+deb9u1 | vulnerable |
| buster | 1.8.2-1+deb10u1 | vulnerable |
| bullseye | 1.8.6-2 | vulnerable |
| sid, trixie, bookworm | 1.10.3-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| libsixel | source | (unstable) | 1.10.3-1 | low | | 972641 |
Notes
[bullseye] - libsixel <no-dsa> (Minor issue)
[buster] - libsixel <no-dsa> (Minor issue)
[stretch] - libsixel <no-dsa> (Minor issue)
[jessie] - libsixel <no-dsa> (Minor issue)
https://github.com/saitoha/libsixel/issues/134
https://github.com/libsixel/libsixel/issues/9
https://github.com/libsixel/libsixel/pull/10
https://github.com/libsixel/libsixel/commit/e71aacc97b5f756948b13c1228877d29395c7b55 (v1.9.0)
Since 1.10.3-1 the Debian package moved from https://github.com/saitoha/libsixel to https://github.com/libsixel/libsixel fork