SB2023091464 - Multiple vulnerabilities in Ghostscript

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Division by zero (CVE-ID: CVE-2020-21710)

The vulnerability allows a remote attacker to crash the application.

The vulnerability exists due to a divide by zero error within the eps_print_page() function in gdevepsn.c. A remote attacker can trick the victim to open a specially crafted PDF file and crash the application.

2) Out-of-bounds write (CVE-ID: CVE-2020-21890)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error within the clj_media_size() function in devices/gdevclj.c. A remote attacker can trick the victim to open a specially crafted PDF file, trigger an out-of-bounds write and execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://bugs.ghostscript.com/show_bug.cgi?id=701843
• https://git.ghostscript.com/?p=ghostpdl.git;a=commit;h=4e713293de84b689c4ab358f3e110ea54aa81925
• https://bugs.ghostscript.com/show_bug.cgi?id=701846
• https://git.ghostscript.com/?p=ghostpdl.git;a=commitdiff;h=494eeedf73d13fac5710e56f3a8fb2e7e2379d73