A buffer overflow vulnerability in okiibm_print_page1() in devices/gdevokii.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 1870168]
In /devices/gdevokii.c's okiibm_print_page1() routine, there's a buffer access graphics_modes_9[x_dpi / 60], which can go out-of-bounds of the global variable with certain x_dpi values that correspond to input pixels per inch. The patch for this flaw ensures that if a value would go out-of-bounds, an error is returned instead. This flaw is triggered by a crafted input PDF 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):