Alpine Linux: CVE-2023-4039: Vulnerability in Multiple Components

Alpine Linux: CVE-2023-4039: Vulnerability in Multiple Components

Severity

6

CVSS

(AV:N/AC:M/Au:N/C:P/I:P/A:N)

Published

09/13/2023

Created

03/22/2024

Added

03/26/2024

Modified

10/02/2024

Description

**DISPUTED**A 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.

Solution(s)

• alpine-linux-upgrade-gcc

References

• https://attackerkb.com/topics/cve-2023-4039
• CVE - 2023-4039
• https://security.alpinelinux.org/vuln/CVE-2023-4039