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Vulnerability Details : 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 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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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.
Published 2018-11-25 10:29:00
Updated 2022-04-18 18:12:29
Source MITRE
View at NVD,   CVE.org
At least one public exploit which can be used to exploit this vulnerability exists!

Exploit prediction scoring system (EPSS) score for CVE-2018-19518

Probability of exploitation activity in the next 30 days: 96.14%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 99 % EPSS Score History EPSS FAQ

Metasploit modules for CVE-2018-19518

  • php imap_open Remote Code Execution
    Disclosure Date : 2018-10-23
    exploit/linux/http/php_imap_open_rce
    The imap_open function within php, if called without the /norsh flag, will attempt to preauthenticate an IMAP session. On Debian based systems, including Ubuntu, rsh is mapped to the ssh binary. Ssh's ProxyCommand option can be passed from imap_open to execute arbitrary commands. While many custom applications may use imap_open, this exploit works against the following applications: e107 v2, prestashop, SuiteCRM, as well as Custom, which simply prints the exploit strings for use. Prestashop exploitation requires the admin URI, and administrator credentials. suiteCRM/e107 require administrator credentials. Fixed in php 5.6.39. Authors: - Anton Lopanitsyn - Twoster - h00die - Paolo Serracino - Pietro Minniti - Damiano Proietti

CVSS scores for CVE-2018-19518

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source
8.5
 HIGH AV:N/AC:M/Au:S/C:C/I:C/A:C
6.8
10.0
 [email protected]
7.5
 HIGH CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
1.6
5.9
 [email protected]

CWE ids for CVE-2018-19518

References for CVE-2018-19518

Products affected by CVE-2018-19518

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