Use After Free in Artifex Ghostscript
CVE-2020-36773
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).
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (58.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Artifex Ghostscript — versions 9.51, 9.52, 9.52.1
Weakness classification (CWE)
References
- bugs.ghostscript.com/show_bug.cgi (Patch, Issue Tracking)
- git.ghostscript.com/ (Broken Link)
- bugzilla.opensuse.org/show_bug.cgi (Issue Tracking)
- github.com/ArtifexSoftware/ghostpdl-downloads/releases/tag/gs9530 (Release Notes)
Frequently asked questions
- What is CVE-2020-36773?
- CVE-2020-36773 is a critical-severity vulnerability in Artifex Ghostscript, classified under Use After Free. CVSS score: 9.8/10. Published 2024-02-04.
- How severe is CVE-2020-36773?
- Critical severity. CVSS v3 base score is 9.8 out of 10.