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Vulnerability · Published Mar 5, 2021 · Assigned by mitre

CVE-2021-28041

High 7.1

In plain English

A high-severity security flaw in the openssh package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.5% (higher than 89% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.1High
Exploit odds (30 days)3.5%top 10.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20openssh8.5_p1-r0ALPINE-CVE-2021-28041
Alpine:v3.21openssh8.5_p1-r0ALPINE-CVE-2021-28041
Alpine:v3.22openssh8.5_p1-r0ALPINE-CVE-2021-28041
Alpine:v3.23openssh8.5_p1-r0ALPINE-CVE-2021-28041
Alpine:v3.24openssh8.5_p1-r0ALPINE-CVE-2021-28041
Debian:12openssh1:8.4p1-5DEBIAN-CVE-2021-28041
Debian:13openssh1:8.4p1-5DEBIAN-CVE-2021-28041
Debian:14openssh1:8.4p1-5DEBIAN-CVE-2021-28041

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References