GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access, and untrusted-pointer read and write operations) 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 and CVE-2014-7169.



Source: MITRE

Published: 2014-09-27

Updated: 2018-08-09

Type: CWE-78

Risk Information

CVSS v2.0

Base Score: 10

Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C)

Impact Score: 10

Exploitability Score: 10

Severity: HIGH