{"id":"UBUNTU-CVE-2018-19518","details":"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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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.","modified":"2026-04-22T11:50:45.176768Z","published":"2018-11-25T10:29:00Z","related":["USN-4160-1"],"upstream":["CVE-2018-19518"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-19518"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2018/11/22/3"},{"type":"REPORT","url":"https://antichat.com/threads/463395/#post-4254681"},{"type":"REPORT","url":"https://github.com/Bo0oM/PHP_imap_open_exploit/blob/master/exploit.php"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4160-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-19518"}],"affected":[{"package":{"name":"php-imap","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/php-imap@5.4.6-0ubuntu5.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.6-0ubuntu5.1"}]}],"versions":["5.4.6-0ubuntu3","5.4.6-0ubuntu5"],"ecosystem_specific":{"availability":"No subscription 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