CVE-2023-4039 Affecting libgcc package, versions <0:8.5.0-18.0.5.el8


Severity

Recommended
low

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.06% (31st percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ORACLE8-LIBGCC-5893126
  • published13 Sept 2023
  • disclosed13 Sept 2023

Introduced: 13 Sep 2023

CVE-2023-4039  (opens in a new tab)

How to fix?

Upgrade Oracle:8 libgcc to version 0:8.5.0-18.0.5.el8 or higher.
This issue was patched in ELSA-2023-12788.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libgcc package and not the libgcc package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

DISPUTEDA failure in the -fstack-protector feature in GCC-based toolchains that target AArch64 allows an attacker to exploit an existing buffer overflow in dynamically-sized local variables in your application without this being detected. This stack-protector failure only applies to C99-style dynamically-sized local variables or those created using alloca(). The stack-protector operates as intended for statically-sized local variables.

The default behavior when the stack-protector detects an overflow is to terminate your application, resulting in controlled loss of availability. An attacker who can exploit a buffer overflow without triggering the stack-protector might be able to change program flow control to cause an uncontrolled loss of availability or to go further and affect confidentiality or integrity. NOTE: The GCC project argues that this is a missed hardening bug and not a vulnerability by itself.

CVSS Scores

version 3.1