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CVE-2014-6271 — GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability

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HIGH severity🔴 Actively Exploited · CISA KEV

🔴 CVE-2014-6271 is being actively exploited in the wild. Check if your infrastructure is exposed: ⚡ Free Exposure Scan

Overview

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute code.

Vulnerability details

CVE ID: CVE-2014-6271
Vulnerability: GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability
Vendor: GNU
Affected products: GNU: Bourne-Again Shell (Bash)
Severity: HIGH
Exploitation status: Actively exploited in the wild (CISA KEV)
Published: 2022-01-28

Remediation guidance

CVE-2014-6271 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.

Apply the vendor's official security update for GNU the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.

Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.

Authoritative references

Remediate CVE-2014-6271 — and stay ahead of the next one

CVE-2014-6271 is listed in the CISA KEV catalog as actively exploited — treat remediation as urgent. Scan your domain free to see whether CVE-2014-6271 and other GNU issues affect you and get a prioritized remediation report (full report from ₹999) — or stream the full feed of 1,600+ actively-exploited CVEs straight into your SOC.

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