CVE-2019-20056

NameCVE-2019-20056
Descriptionstb_image.h (aka the stb image loader) 2.23, as used in libsixel and other products, has an assertion failure in stbi__shiftsigned.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs948103

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libsixel (PTS)stretch1.5.2-2+deb9u1vulnerable
buster1.8.2-1+deb10u1vulnerable
bullseye, sid1.8.6-2fixed
libstb (PTS)buster0.0~git20180212.15.e6afb9c-1vulnerable
bullseye, sid0.0~git20190817.1.052dce1-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libsixelsource(unstable)1.8.6-1low948103
libstbsource(unstable)(unfixed)low

Notes

[buster] - libsixel <no-dsa> (Minor issue)
[stretch] - libsixel <no-dsa> (Minor issue)
[jessie] - libsixel <no-dsa> (Minor issue)
[buster] - libstb <no-dsa> (Minor issue)
libsixel PR: https://github.com/saitoha/libsixel/issues/126
libsixel patch: https://github.com/saitoha/libsixel/commit/814f831555ea2492d442e784ab5d594f6a8e2e8d
libstb PR: https://github.com/nothings/stb/issues/886

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