CVE-2023-7340 - CVE House

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Status published Medium CVE-2023-7340

Wazuh authd service (os_auth) Heap-based Buffer Overflow

5.3 CVSS

Vulnerability Description

Wazuh authd contains a heap-buffer overflow vulnerability that allows attackers to cause memory corruption and malformed heap data by sending specially crafted input. Attackers can exploit this vulnerability to trigger a denial of service condition, resulting in low availability impact to the authentication daemon.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Reported by @vikman90; credited to @stasos24.

References

More from Wazuh

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Wazuh GitHub Actions Workflow Exposure of Sensitive Credentials

Wazuh Agent and Manager OS Command Injection and Untrusted Search Path

Wazuh Manager authd service Improper SSL/TLS Renegotiation Handling leading to Denial of Service

Wazuh Provisioning Scripts / Build Infrastructure Improper Certificate Validation leading to MITM and RCE

Remote code execution and local privilege escalation in Wazuh Windows agent via NetNTLMv2 hash theft

Affected Vendor

Wazuh

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Affected Software

Wazuh

Vulnerable Versions:

3.5.0

Timeline

Official Publish: March 27th, 2026

Last Modified: July 15th, 2026

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1213 Data from Information Repositories

T1003 OS Credential Dumping

Credential Access

T1552 Unsecured Credentials

Credential Access