A buffer overflow vulnerability in jetp3852_print_page() in devices/gdev3852.c of Artifex Software GhostScript v9.50 allows a remote attacker to escalate privileges via a crafted PDF file. This is fixed in v9.51. References: https://bugs.ghostscript.com/show_bug.cgi?id=701815 https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=366ad48d076c1aa4c8f83c65011258a04e348207
Created ghostscript tracking bugs for this issue: Affects: fedora-all [bug 1870269]
Flaw summary: In jetp3852_print_page of /devices/gdev3852.c, buffer `data[DATA_SIZE]` is created but not initialized. Data from this buffer is later used to index into the `srp8[]` buffer[1], causing a potential out-of-bounds read. The patch uses memset to 0-initialize the `data` buffer after its creation. 1. https://git.ghostscript.com/?p=ghostpdl.git;a=blob;f=devices/gdev3852.c;h=d984fa102ef7b5087843a9f856dcfa05147586d5;hb=366ad48d076c1aa4c8f83c65011258a04e348207#l120
I've lowered this to Low because when testing on version 9.25, ghostscript catches the error and exits without triggering addresssanitizer. Additionally, this seems to be mislabeled as a privilege escalation bug at various outlets. The initial report shows that this is an out-of-bounds read of a global buffer which could lead to 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-2020-16302