HTTP: PHP imap_open function Remote Code Execution
This signature detects attempts to exploit a known vulnerability against PHP imap_open function. A successful attack can lead to arbitrary code execution.
Extended 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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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.
Affected Products
Canonical ubuntu_linux
References
CVE: CVE-2018-19518
Short Name
HTTP:CTS:PHP-IMAP-OPEN-RCE
Severity
Major
Recommended
False
Recommended Action
Drop
Category
HTTP
Keywords
CVE-2018-19518 Code Execution PHP Remote function imap_open
Release Date
02/17/2022
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3771
False Positive
Unknown
Vendors
Uw-imap_project
Php
Debian
Canonical
CVSS Score
8.5