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. References: https://bugs.ghostscript.com/show_bug.cgi?id=701788 https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=d31e25ed5b130499e0d880e4609b1b4824699768
Created ghostscript tracking bugs for this issue: Affects: fedora-all [bug 1870245]
Flaw Summary: 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[1] adds 1 to length to account for the null terminator, thus mitigating this flaw. 1. https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=d31e25ed5b130499e0d880e4609b1b4824699768;hp=6e6c69487094b877bc56fcc07b9840f6e5b95925
Moving to Low as this is just a 1 byte out-of-bounds write whose data is not controlled by a potential attacker.
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-2020-16289