CVE-2014-6271
bash: specially-crafted environment variables can be used to inject shell commands
Severity
CriticalRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · September 24, 2014
Updated · November 2, 2026
Description
A flaw was found in the way Bash evaluated certain specially crafted environment variables. An attacker could use this flaw to override or bypass environment restrictions to execute shell commands. Certain services and applications allow remote unauthenticated attackers to provide environment variables, allowing them to exploit this issue.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 7.5AV:N/AC:L/Au:N/C:P/I:P/A:P
CWE-78 · Improper Neutralization of Special Elements used in an OS Command