A buffer overflow vulnerability in epsc_print_page() in devices/gdevepsc.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=701794 https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=89f58f1aa95b3482cadf6977da49457194ee5358
Created ghostscript tracking bugs for this issue: Affects: fedora-all [bug 1870232]
Flaw summary: This flaw is an out-of-bounds read of global variables graphics_modes_9 and graphics_modes_24, which occurs in the epsc_print_page() routine in /devices/gdevepsc.c. the arrays are indexed like: graphics_modes_9[x_dpi / 60]. If x_dpi (which is parsed from the input file) is too large. x_dpi is set as (int)pdev->x_pixels_per_inch. The patch establishes a max_dpi and checks x_dpi against it to error out and avoid this flaw.
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-2020-16294