A buffer overflow vulnerability in cif_print_page() in devices/gdevcif.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 1870245]
In cif_print_page() routine of /devices/gdevcif.c, the malloc() call does not leave space for a NULL string terminator, resulting in an out-of-bounds write of length 1 during the sunsequent operation `*(s + length) = '\0';` The patch adds 1 to length to account for the null terminator, thus mitigating this flaw.
Moving to Low as this is just a 1 byte out-of-bounds write whose data is not controlled by a potential attacker.
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):