CVE-2023-49275 Wazuh vulnerable to NULL Pointer Dereference in wazuh-analysisd
A malicious client can cause a denial of service in the Wazuh analysis engine by sending a malformed syscollector message lacking a timestamp.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-49275?
CVE-2023-49275 is a medium-severity vulnerability in Wazuh Wazuh, published on 19 Apr 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-476
Which versions are affected by CVE-2023-49275?
It affects 1 product.
Products include Wazuh Wazuh.
How do I fix CVE-2023-49275?
No fix has been published for CVE-2023-49275 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-49275 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-49275 exists.
Other vulnerabilities in Wazuh Wazuh
- CVE-2025-24016 Wazuh Server Deserialization of Untrusted Data
- CVE-2024-32038 Wazuh Analysis Engine Event Decoder Heap-based Buffer Overflow Remote Code Execution Vulnerability
- CVE-2021-44079 Command injection in n/a
- CVE-2024-1243 Remote code execution and local privilege escalation in Wazuh Windows agent via NetNTLMv2 hash theft
- CVE-2026-61800 Wazuh cluster worker file sync allows arbitrary file write under /var/ossec (incomplete fix for CVE-2026-30893)
Sources
Also known as GHSA-4mq7-w9r6-9975.