CVE-2014-6271

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.

Score
CVSS 3.1 9.8 Critical
Status
Analyzed - security@debian.org
Published
2014-09-24
Last modified
2025-10-22
Known exploited (CISA KEV)
since 2022-01-28, action due 2022-07-28: Apply updates per vendor instructions.
Weaknesses
CWE-78

Affected products

References

 
 
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