Vulnerability CVE-2018-19518
Published: 2018-11-25

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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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.

Type:

CWE-78

 (Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') )

CVSS2 => (AV:N/AC:M/Au:S/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
8.5/10
10/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Uw-imap project -> Uw-imap 
University of washington -> Uw-imap 
PHP -> PHP 
Debian -> Debian linux 

 References:
http://www.securityfocus.com/bid/106018
http://www.securitytracker.com/id/1042157
https://antichat.com/threads/463395/#post-4254681
https://bugs.debian.org/913775
https://bugs.debian.org/913835
https://bugs.debian.org/913836
https://bugs.php.net/bug.php?id=76428
https://bugs.php.net/bug.php?id=77153
https://bugs.php.net/bug.php?id=77160
https://git.php.net/?p=php-src.git;a=commit;h=e5bfea64c81ae34816479bb05d17cdffe45adddb
https://github.com/Bo0oM/PHP_imap_open_exploit/blob/master/exploit.php
https://lists.debian.org/debian-lts-announce/2018/12/msg00006.html
https://lists.debian.org/debian-lts-announce/2019/03/msg00001.html
https://security.netapp.com/advisory/ntap-20181221-0004/
https://www.debian.org/security/2018/dsa-4353
https://www.exploit-db.com/exploits/45914/
https://www.openwall.com/lists/oss-security/2018/11/22/3
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