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CVE-2014-6271

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote…

Critical9.8Known exploitedEPSS 100.0%
Published
Updated
Reserved
Assigned by
debian

Description

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code 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, aka "ShellShock." NOTE: the original fix for this issue was incorrect; CVE-2014-7169 has been assigned to cover the vulnerability that is still present after the incorrect fix.

Exploited in the wild

CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability.

Added
28 Jan 2022
Fix due (US federal)
28 Jul 2022
Used by ransomware
Not known

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Scores

CVSS scores of CVE-2014-6271, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Analyzed3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
100.0% · top 0.1% of all CVEs (5 Nov 2026)
CISA SSVC
Exploitation: active · Automatable: yes · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

Affected products

  • n/a

    • affected n/a

References (171)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .