A division by zero vulnerability in bj10v_print_page() in contrib/japanese/gdev10v.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 1870172]
A division by zero could occur in /contrib/japanese/gdev10v.c at the line: count = ((out_end - (outl + 1)) / bytes_per_column) * bytes_per_column;
If bytes_per_column is 0 as designated by crafted yres input from a file manipulated by an attacker, this will cause a divide-by-zero exception and crash the program.
It is not immediately clear how the linked patch fixes this, as I do not see the patched function in the backtrace and the patched functionality is in a different file.
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):