CVE-2018-19518
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...
- Published
- Nov 25, 2018
- Updated
- Aug 5, 2024
- Assigning CNA
- mitre
- Evidence observed
- Nov 29, 2018
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.9%
- Model date
- Oct 15, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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.
Sources
php/CVE-2018-19518
PHP IMAP Remote Command Execution (CVE-2018-19518)
Vulhub vulnerability labsDeclared conditions
- lab image version: vulhub/php:5.6.38-apache(php/CVE-2018-19518/docker-compose.yml:services.web.image)
modules/exploits/linux/http/php_imap_open_rce.rb
Metasploit Framework modulesDeclared conditions
- platform: Unix($.exploit_linux/http/php_imap_open_rce.platform)
- verification: check_declared($.exploit_linux/http/php_imap_open_rce.check)
Responsible use
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