CVE-2018-19518

Public Exploit

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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 93.96% Top 5%
Vendor Advisory debian.org Vendor Advisory ubuntu.com Vendor Advisory gentoo.org Vendor Advisory php.net Vendor Advisory php.net Vendor Advisory php.net
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugs.php.net/bug.php?id=77160 vendor advisory
https://www.exploit-db.com/exploits/45914/ exploit vdb entry third party advisory
https://lists.debian.org/debian-lts-announce/2019/03/msg00001.html third party advisory mailing list
https://security.netapp.com/advisory/ntap-20181221-0004/ third party advisory
http://www.securitytracker.com/id/1042157 vdb entry broken link
https://www.debian.org/security/2018/dsa-4353 third party advisory vendor advisory
https://github.com/Bo0oM/PHP_imap_open_exploit/blob/master/exploit.php third party advisory exploit
https://bugs.debian.org/913835 third party advisory mailing list
https://www.openwall.com/lists/oss-security/2018/11/22/3 mailing list exploit third party advisory
https://git.php.net/?p=php-src.git%3Ba=commit%3Bh=e5bfea64c81ae34816479bb05d17cdffe45adddb
http://www.securityfocus.com/bid/106018 vdb entry broken link
https://bugs.php.net/bug.php?id=76428 mailing list exploit vendor advisory
https://bugs.debian.org/913775 third party advisory mailing list
https://bugs.debian.org/913836 third party advisory mailing list
https://antichat.com/threads/463395/#post-4254681 third party advisory exploit
https://bugs.php.net/bug.php?id=77153 mailing list exploit vendor advisory
https://lists.debian.org/debian-lts-announce/2018/12/msg00006.html third party advisory mailing list
https://usn.ubuntu.com/4160-1/ third party advisory vendor advisory
https://security.gentoo.org/glsa/202003-57 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00031.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2018-19518?
CVE-2018-19518 has been scored as a high severity vulnerability.
How to fix CVE-2018-19518?
To fix CVE-2018-19518, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-19518 being actively exploited in the wild?
It is possible that CVE-2018-19518 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~94% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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