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Vulnerability · Published Apr 29, 2021 · Assigned by redhat

CVE-2021-20294

High 7.8

In plain English

A high-severity out-of-bounds write in binutils. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.3% (higher than 88% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)3.3%top 11.5% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12binutils2.35.2-1DEBIAN-CVE-2021-20294
Debian:13binutils2.35.2-1DEBIAN-CVE-2021-20294
Debian:14binutils2.35.2-1DEBIAN-CVE-2021-20294

Affected products (as reported)

VendorProductVersions
n/a binutils binutils 2.35.2

Weakness: CWE-787

References