| Name | CVE-2020-36773 |
| Description | Artifex Ghostscript before 9.53.0 has an out-of-bounds write and use-after-free in devices/vector/gdevtxtw.c (for txtwrite) because a single character code in a PDF document can map to more than one Unicode code point (e.g., for a ligature). |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| ghostscript (PTS) | jessie, jessie (lts) | 9.26a~dfsg-0+deb8u13 | fixed |
| stretch (security) | 9.26a~dfsg-0+deb9u9 | fixed |
| stretch (lts), stretch | 9.26a~dfsg-0+deb9u13 | fixed |
| buster, buster (lts) | 9.27~dfsg-2+deb10u10 | fixed |
| buster (security) | 9.27~dfsg-2+deb10u9 | fixed |
| bullseye | 9.53.3~dfsg-7+deb11u7 | fixed |
| bullseye (security) | 9.53.3~dfsg-7+deb11u9 | fixed |
| bookworm | 10.0.0~dfsg-11+deb12u5 | fixed |
| bookworm (security) | 10.0.0~dfsg-11+deb12u6 | fixed |
| sid, trixie | 10.04.0~dfsg-2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[buster] - ghostscript <not-affected> (regression introduced in version 9.50)
https://bugs.ghostscript.com/show_bug.cgi?id=702229
Fixed by: http://www.ghostscript.com/cgi-bin/findgit.cgi?8c7bd787defa071c96289b7da9397f673fddb874 (ghostpdl-9.53.0rc1)
[stretch] - ghostscript <not-affected> (regression introduced in version 9.50)
[jessie] - ghostscript <not-affected> (regression introduced in version 9.50)