#VU81045 Security features bypass in Gnu Compiler Collection - CVE-2023-4039

Vulnerability identifier: #VU81045

Vulnerability risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-4039

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Gnu Compiler Collection
Client/Desktop applications / Software for system administration

Vendor: GNU

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to the GCC's stack smashing protection does not detect or defend against overflows of dynamically-sized local variables on AArch64 targets. A remote attacker can bypass expected security restrictions and successfully exploit buffer overflow vulnerabilities.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Gnu Compiler Collection: 2.8.0 - 13.2.0

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External links
https://github.com/metaredteam/external-disclosures/security/advisories/GHSA-x7ch-h5rf-w2mf
https://developer.arm.com/Arm%20Security%20Center/GCC%20Stack%20Protector%20Vulnerability%20AArch64

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.