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…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 96.1%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 96.11% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 29 November 2018
- CISA KEV
- Not listed
- Weakness
- CWE-88
- Affected
- php/php · debian/debian linux · uw-imap project/uw-imap · canonical/ubuntu linux
- Source
- cve@mitre.org
EPSS 96.1% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://www.securityfocus.com/bid/106018Broken Link
- http://www.securitytracker.com/id/1042157Broken Link
- https://antichat.com/threads/463395/#post-4254681Exploit, Third Party Advisory
- https://bugs.debian.org/913775Mailing List, Third Party Advisory
- https://bugs.debian.org/913835Mailing List, Third Party Advisory
- https://bugs.debian.org/913836Mailing List, Third Party Advisory
- https://bugs.php.net/bug.php?id=76428Exploit, Mailing List, Vendor Advisory
- https://bugs.php.net/bug.php?id=77153Exploit, Mailing List, Vendor Advisory
- https://bugs.php.net/bug.php?id=77160Vendor Advisory
- https://git.php.net/?p=php-src.git%3Ba=commit%3Bh=e5bfea64c81ae34816479bb05d17cdffe45adddb
- https://github.com/Bo0oM/PHP_imap_open_exploit/blob/master/exploit.phpExploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/12/msg00006.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00001.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00031.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202003-57Third Party Advisory
- https://security.netapp.com/advisory/ntap-20181221-0004/Third Party Advisory
- https://usn.ubuntu.com/4160-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4353Third Party Advisory
- https://www.exploit-db.com/exploits/45914/Exploit, Third Party Advisory, VDB Entry
- https://www.openwall.com/lists/oss-security/2018/11/22/3Exploit, Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/106018Broken Link
- http://www.securitytracker.com/id/1042157Broken Link
- https://antichat.com/threads/463395/#post-4254681Exploit, Third Party Advisory
- https://bugs.debian.org/913775Mailing List, Third Party Advisory
- https://bugs.debian.org/913835Mailing List, Third Party Advisory
- https://bugs.debian.org/913836Mailing List, Third Party Advisory
- https://bugs.php.net/bug.php?id=76428Exploit, Mailing List, Vendor Advisory
- https://bugs.php.net/bug.php?id=77153Exploit, Mailing List, Vendor Advisory
- https://bugs.php.net/bug.php?id=77160Vendor Advisory
- https://git.php.net/?p=php-src.git%3Ba=commit%3Bh=e5bfea64c81ae34816479bb05d17cdffe45adddb
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.