A buffer overflow vulnerability in GetNumWrongData() in contrib/lips4/gdevlips.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.
Created ghostscript tracking bugs for this issue:
Affects: fedora-all [bug 1870176]
The GetNumWrongData() function in /contrib/lips4/gdevlips.c could perform a buffer overflow due to while loop conditions in an improper order:
`while (*(curPtr + count) != *(curPtr + count + 1) && maxnum > count)`
In this case, `maxnum > count` should be checked prior to dereferencing `curPtr + count` to avoid a potential heap buffer overread. The patch does this.
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):