UBUNTU-CVE-2014-6278

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UBUNTU-CVE-2014-6278

Summary:

Details: 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 commands 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, CVE-2014-7169, and CVE-2014-6277.

References: https://ubuntu.com/security/CVE-2014-6278, http://lcamtuf.blogspot.ca/2014/09/bash-bug-apply-unofficial-patch-now.html, http://seclists.org/fulldisclosure/2014/Oct/9, http://lcamtuf.blogspot.ca/2014/10/bash-bug-how-we-finally-cracked.html, https://ubuntu.com/security/notices/USN-2380-1, https://www.cve.org/CVERecord?id=CVE-2014-6278, https://www.cisa.gov/known-exploited-vulnerabilities-catalog