Integer underflow in Wazuh

1) Integer underflow

EUVDB-ID: #VU86339

Risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-42463

CWE-ID: CWE-191 - Integer underflow

Exploit availability: No

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

External links

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

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.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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