UBUNTU-CVE-2014-7169

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UBUNTU-CVE-2014-7169

Summary:

Details: GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variables, which allows remote attackers to write to files or possibly have unknown other impact 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.

References: https://ubuntu.com/security/CVE-2014-7169, https://twitter.com/taviso/status/514887394294652929, http://www.openwall.com/lists/oss-security/2014/09/25/5, https://ubuntu.com/security/notices/USN-2363-1, https://ubuntu.com/security/notices/USN-2363-2, https://www.cve.org/CVERecord?id=CVE-2014-7169, https://www.cisa.gov/known-exploited-vulnerabilities-catalog