CVE-2021-21859: debian debian_linux Integer Overflow to Buffer Overflow

Vulnerability summary

CVE-2021-21859 is a high (CVSS 8.8) Integer Overflow to Buffer Overflow vulnerability in debian debian_linux. EPSS estimates a 1.59% chance of exploitation in the next 30 days, higher than 75.3% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 16-08-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

An exploitable integer truncation vulnerability exists within the MPEG-4 decoding functionality of the GPAC Project on Advanced Content library v1.0.1. The stri_box_read function is used when processing atoms using the 'stri' FOURCC code. An attacker can convince a user to open a video to trigger this vulnerability.

• CWE-680Integer Overflow to Buffer OverflowThe product performs a calculation to determine how much memory to allocate, but an integer overflow can occur that causes less memory to be allocated than expected, leading to a buffer overflow.
• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.