CVE-2020-11721

NameCVE-2020-11721
Descriptionload_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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs972641

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libsixel (PTS)jessie1.1.2-1vulnerable
stretch1.5.2-2+deb9u1vulnerable
buster1.8.2-1+deb10u1vulnerable
bullseye1.8.6-2vulnerable
sid, trixie, bookworm1.10.3-3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libsixelsource(unstable)1.10.3-1low972641

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

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