Wazuh up to 4.11.x w_expression_match buffer over-read

Summaryinfo

A vulnerability has been found in Wazuh up to 4.11.x and classified as problematic. This affects the function w_expression_match. The manipulation leads to buffer over-read. This vulnerability is documented as CVE-2025-62792. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Wazuh up to 4.11.x and classified as problematic. This issue affects the function w_expression_match. The manipulation with an unknown input leads to a buffer over-read vulnerability. Using CWE to declare the problem leads to CWE-126. The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer. Impacted is availability. The summary by CVE is:

Wazuh is a free and open source platform used for threat prevention, detection, and response. Prior to 4.12.0, a buffer over-read occurs in w_expression_match() when strlen() is called on str_test, because the corresponding buffer is not being properly NULL terminated during its allocation in OS_CleanMSG(). A compromised agent can cause a READ operation beyond the end of the allocated buffer (which may contain sensitive information) by sending a specially crafted message to the wazuh manager. An attacker who is able to craft and send an agent message to the wazuh manager can cause a buffer over-read and potentially access sensitive data. This vulnerability is fixed in 4.12.0.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-62792 since 10/22/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 4.12.0 eliminates this vulnerability.

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Productinfo

Name

• Wazuh

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10
• 4.11

Website

• Product: https://github.com/wazuh/wazuh/

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