critical10.0Public exploit code

CVE-2014-6277

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 a…

Public exploit code

Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.

dhclient 4.1 - Bash Environment Variable Command Injection (Shellshock)2014-09-29 · remote · linux · Verified
Binary File Descriptor Library (libbfd) - Out-of-Bounds Crash2014-10-27 · dos · linux · Verified
GNU bash 4.3.11 - Environment Variable dhclient2014-10-02 · remote · linux

Impact

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.

Affected products

Vendor	Product	Affected versions
Gnu	Bash	Versions 1.14.0, 1.14.1, 1.14.2, 1.14.3, 1.14.4, 1.14.5

Weakness classification

CWE-78

Public exploit code

Impact

Affected products

Weakness classification

References