#VU86339 Integer underflow in Wazuh - CVE-2023-42463

Vulnerability identifier: #VU86339

Vulnerability risk: Low

CVSSv4.0: 4.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-42463

CWE-ID: CWE-191

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Wazuh
Server applications / Server solutions for antivurus protection

Vendor: Wazuh

Description

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

The vulnerability exists due to integer underflow within the processing of the multilines log format. A local attacker can send a specially crafted request to the affected application, trigger integer underflow and execute arbitrary code on the target system with elevated privileges.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Wazuh: 4.5.0 - 4.5.2

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External links
https://github.com/wazuh/wazuh/security/advisories/GHSA-27p5-32pp-r58r
https://www.zerodayinitiative.com/advisories/ZDI-24-097/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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