CVE-2018-19518

HIGH severity · CVSS 7.5 · CWE-88

7.5CVSS HIGH

Summary

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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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

Impact & exploitability

Attack vectorNetwork

Attack complexityHigh

Privileges requiredLow

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)94%

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

PHP

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Additional information

NVD record
https://bugs.php.net/bug.php?id=76428Advisory
https://bugs.php.net/bug.php?id=77153Advisory
http://www.securityfocus.com/bid/106018
http://www.securitytracker.com/id/1042157
https://bugs.debian.org/913775Advisory
https://bugs.debian.org/913835Advisory
https://bugs.debian.org/913836Advisory
https://antichat.com/threads/463395/#post-4254681Advisory