{"id":"CVE-2018-19518","aliases":[],"url":"https://o3.security/vulnerability/CVE-2018-19518","summary":null,"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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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.","published":"2018-11-25T10:29:00.250Z","modified":"2026-08-07T11:48:26.367444798Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.9523,"percentile":0.99858,"asOf":"2026-08-27"},"cisaKev":null,"exploitsKnown":10,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"http://www.securityfocus.com/bid/106018"},{"type":"WEB","url":"http://www.securitytracker.com/id/1042157"},{"type":"WEB","url":"https://git.php.net/?p=php-src.git%3Ba=commit%3Bh=e5bfea64c81ae34816479bb05d17cdffe45adddb"},{"type":"ADVISORY","url":"https://bugs.debian.org/913775"},{"type":"ADVISORY","url":"https://bugs.debian.org/913835"},{"type":"ADVISORY","url":"https://bugs.debian.org/913836"},{"type":"ADVISORY","url":"https://bugs.php.net/bug.php?id=77160"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2018/12/msg00006.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/03/msg00001.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/12/msg00031.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202003-57"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20181221-0004/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4160-1/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4353"},{"type":"EVIDENCE","url":"https://antichat.com/threads/463395/#post-4254681"},{"type":"EVIDENCE","url":"https://bugs.php.net/bug.php?id=76428"},{"type":"EVIDENCE","url":"https://bugs.php.net/bug.php?id=77153"},{"type":"EVIDENCE","url":"https://github.com/Bo0oM/PHP_imap_open_exploit/blob/master/exploit.php"},{"type":"EVIDENCE","url":"https://www.exploit-db.com/exploits/45914/"},{"type":"EVIDENCE","url":"https://www.openwall.com/lists/oss-security/2018/11/22/3"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:48:26.367444798Z"}}