A buffer overflow vulnerability in FloydSteinbergDitheringC() in contrib/gdevbjca.c of Artifex Software GhostScript v9.50 allows a remote attacker to cause a denial of service via a crafted PDF file. This is fixed in v9.51. References: https://bugs.ghostscript.com/show_bug.cgi?id=701800 https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=bf72f1a3dd5392ee8291e3b1518a0c2c5dc6ba39
Created ghostscript tracking bugs for this issue: Affects: fedora-all [bug 1870228]
Flaw summary: FloydSteinbergDitheringC() in /contrib/gdevbjca.c processes gamma tables row-by-row and could perform a buffer overread if row data was too large. Since the row data is collected from a PDF, an attacker would need to supply a crafted PDF to be parsed by ghostscript in order to potentially cause a denial of service.
Mitigation: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:1852 https://access.redhat.com/errata/RHSA-2021:1852
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-16297