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CRITICAL KEV

bash: code execution via specially-crafted environment (Incomplete fix for CVE-2014-6271)

Published Sep 25, 2014 ·Due Jul 28, 2022

Description

GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variables, which allows remote attackers to write to files or possibly have unknown other impact via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271.

Affected products

Remediation

No remediation recorded yet.

Metrics

References (166)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Sep 25, 2014
Updated Oct 22, 2025
Reserved Sep 24, 2014
CISA Vulnrichment
Updated Feb 10, 2025
NVD
Status Analyzed
Modified Jun 17, 2026
Red Hat
Severity Important
Public date Sep 24, 2014