CVE-2021-40426: sound_exchange_project sound_exchange Heap-based Buffer Overflow

Vulnerability summary

CVE-2021-40426 is a critical (CVSS 10.0) Heap-based Buffer Overflow vulnerability in sound_exchange_project sound_exchange. EPSS estimates a 2.21% chance of exploitation in the next 30 days, higher than 82.4% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 14-04-2022
   PublishedVulnerability first disclosed.
2. 15-04-2025
   Last modifiedVulnerability information updated.

Description

A heap-based buffer overflow vulnerability exists in the sphere.c start_read() functionality of Sound Exchange libsox 14.4.2 and master commit 42b3557e. A specially-crafted file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

• 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.