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Case File

CVE-2021-20291

MEDIUM · CVSS 6.5 EPSS 1.59%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-04-01 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.5. It affects GitHub. It may lead to a denial-of-service condition.

CVE
CVE-2021-20291
Severity
MEDIUM
CVSS
6.5
EPSS
1.59%
GitHub

Original NVD Description

A deadlock vulnerability was found in 'github.com/containers/storage' in versions before 1.28.1. When a container image is processed, each layer is unpacked using `tar`. If one of those layers is not a valid `tar` archive this causes an error leading to an unexpected situation where the code indefinitely waits for the tar unpacked stream, which never finishes. An attacker could use this vulnerability to craft a malicious image, which when downloaded and stored by an application using containers/storage, would then cause a deadlock leading to a Denial of Service (DoS).

Related CVEs

Other vulnerabilities affecting the same vendor(s)