CVE-2024-10525: eclipse foundation mosquitto Heap-based Buffer Overflow

Vulnerability summary

CVE-2024-10525 is a critical (CVSS 9.8) Heap-based Buffer Overflow vulnerability in eclipse foundation mosquitto. EPSS estimates a 59.22% chance of exploitation in the next 30 days, higher than 99.1% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 30-10-2024
   PublishedVulnerability first disclosed.
2. 03-11-2025
   Last modifiedVulnerability information updated.

Description

In Eclipse Mosquitto, from version 1.3.2 through 2.0.18, if a malicious broker sends a crafted SUBACK packet with no reason codes, a client using libmosquitto may make out of bounds memory access when acting in its on_subscribe callback. This affects the mosquitto_sub and mosquitto_rr clients.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.