What’s Vulnerable › Vulnerabilities

CVE-2023-49275: Wazuh vulnerable to NULL Pointer Dereference in wazuh-analysisd

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-04-19 · updated 2026-06-17
• Weakness: CWE-476

Description

Wazuh is a free and open source platform used for threat prevention, detection, and response. A NULL pointer dereference was detected during fuzzing of the analysis engine, allowing malicious clients to DoS the analysis engine. The bug occurs when `analysisd` receives a syscollector message with the `hotfix` `msg_type` but lacking a `timestamp`. It uses `cJSON_GetObjectItem()` to get the `timestamp` object item and dereferences it without checking for a `NULL` value. A malicious client can DoS the analysis engine. This vulnerability is fixed in 4.7.1.

Affected products

• wazuh: from 3.2.0 before 4.7.1 — fixed in 4.7.1

How to fix

Upgrade to a fixed version: wazuh 4.7.1. Check the vendor advisory for mitigations.

References

• https://github.com/wazuh/wazuh/blob/e1d5231b31b68a75f3b8b33f833155b362411078/src/analysisd/decoders/syscollector.c#L1573
• https://github.com/wazuh/wazuh/blob/e1d5231b31b68a75f3b8b33f833155b362411078/src/analysisd/decoders/syscollector.c#L1578
• https://github.com/wazuh/wazuh/security/advisories/GHSA-4mq7-w9r6-9975
• https://github.com/wazuh/wazuh/blob/e1d5231b31b68a75f3b8b33f833155b362411078/src/analysisd/decoders/syscollector.c#L1573
• https://github.com/wazuh/wazuh/blob/e1d5231b31b68a75f3b8b33f833155b362411078/src/analysisd/decoders/syscollector.c#L1578
• https://github.com/wazuh/wazuh/security/advisories/GHSA-4mq7-w9r6-9975

Get alerted when CVE-2023-49275 or the next vulnerability affects your stack