CVE-2021-20294: gnu binutils Out-of-bounds Write

Vulnerability summary

CVE-2021-20294 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in gnu binutils. EPSS estimates a 3.28% chance of exploitation in the next 30 days, higher than 88.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 29-04-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

A flaw was found in binutils readelf 2.35 program. An attacker who is able to convince a victim using readelf to read a crafted file could trigger a stack buffer overflow, out-of-bounds write of arbitrary data supplied by the attacker. The highest impact of this flaw is to confidentiality, integrity, and availability.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.