CVE-2018-19518

HIGH

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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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

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

Details

Source: MITRE

Published: 2018-11-25

Updated: 2019-03-05

Type: CWE-78

Risk Information

CVSS v2.0

Base Score: 8.5

Vector: AV:N/AC:M/Au:S/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 6.8

Severity: HIGH

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.6

Severity: HIGH