CVE-2014-6271
GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability
- Published
- Sep 24, 2014
- Updated
- Oct 22, 2025
- Assigning CNA
- debian
- Evidence observed
- Sep 25, 2014
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 100.0%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
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.
Sources
97CVE-2014-6271
- shellshock_crawlerScanner
Using google to scan sites for "ShellShock" (CVE-2014-6271)
- CVE-2014-6271Exploit
Responsible use
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