#VU79803 Buffer overflow in libqb - CVE-2023-39976

Vulnerability identifier: #VU79803

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-39976

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libqb
Universal components / Libraries / Libraries used by multiple products

Vendor: ClusterLabs

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in log_blackbox.c. A remote attacker can send an overly long log message tp the application, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

libqb: 2.0.0 - 2.0.7

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External links
https://github.com/ClusterLabs/libqb/pull/490
https://github.com/ClusterLabs/libqb/commit/1bbaa929b77113532785c408dd1b41cd0521ffc8
https://github.com/ClusterLabs/libqb/compare/v2.0.7...v2.0.8

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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.