Description
University of Washington IMAP Toolkit 2007f on UNIX, as used in imap_open() in PHP and other products, launches an rsh command (by means of the imap_rimap function in c-client/imap4r1.c and the tcp_aopen function in osdep/unix/tcp_unix.c) without preventing argument injection, which might allow remote attackers to execute arbitrary OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics. For example, if rsh is a link to ssh (as seen on Debian and Ubuntu systems), then the attack can use an IMAP server name containing a "-oProxyCommand" argument.
Remediation
References
Related Vulnerabilities
PHP Permissions, Privileges, and Access Controls Vulnerability (CVE-2008-0145)
Dolphin Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2014-4333)
IBM WebSEAL Session Fixation Vulnerability (CVE-2018-1804)
ownCloud Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2016-1500)