Libsixel prior to v1.8.3 contains a stack buffer overflow in the function gif_process_raster at fromgif.c.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-21050
Reference (s):
- https://bitbucket.org/netbsd/pkgsrc/commits/a27113e21179cbfbfae0c35f6a9edd6aa498faae
- https://github.com/saitoha/libsixel/blob/master/ChangeLog
- https://github.com/saitoha/libsixel/commit/7808a06b88c11dbc502318cdd51fa374f8cd47ee
- https://github.com/saitoha/libsixel/issues/75
- https://github.com/saitoha/libsixel/releases/tag/v1.8.5