CVE-2023-4039

CVE Details

Release Date:	2023-09-12
Impact:	Moderate	What is this?

Description

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.

See more information about CVE-2023-4039 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	4.8
Vector String:	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Version:	3.0
Attack Vector:	Network
Attack Complexity:	High
Privileges Required:	None
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	Low
Integrity Impact:	Low
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (cross-gcc)	ELSA-2023-28765	2023-09-12
Oracle Linux version 8 (cross-gcc)	ELSA-2023-28766	2023-09-12
Oracle Linux version 8 (gcc)	ELSA-2023-12788	2023-09-12
Oracle Linux version 8 (gcc-toolset-11-gcc)	ELSA-2023-12788	2023-09-12
Oracle Linux version 8 (gcc-toolset-12-gcc)	ELSA-2023-12788	2023-09-12
Oracle Linux version 9 (cross-gcc)	ELSA-2023-28765	2023-09-12
Oracle Linux version 9 (gcc)	ELSA-2023-12788	2023-09-12
Oracle Linux version 9 (gcc-toolset-12-gcc)	ELSA-2023-12788	2023-09-12