Bug 671872 (CVE-2018-19518)

Summary:	<dev-lang/php-{5.6.39,7.0.33,7.1.25,7.2.13,7.3.0}: Shell command injection through imap_open() connection params
Product:	Gentoo Security	Reporter:	Vlad K. <vk-gentoo-bugs>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	normal	CC:	php-bugs
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://www.openwall.com/lists/oss-security/2018/11/22/3
Whiteboard:	B2 [glsa+ cve]
Package list:		Runtime testing required:	---

Description Vlad K. 2018-11-25 14:25:59 UTC

* CVE-2018-19518

  https://www.openwall.com/lists/oss-security/2018/11/22/3
  https://bugs.php.net/bug.php?id=76428
  https://bugs.php.net/bug.php?id=77153

  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  rsh has been replaced by a program with different argument semantics.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. -- CVE listing

--
Gentoo Security Scout
Vladimir Krstulja

Comment 1 Vlad K. 2018-11-25 14:31:19 UTC

Severity B2 because this has the potential of RCE in situations where IMAP server connections are user-configurable (eg. in webmails).

Comment 2 Vlad K. 2018-12-05 21:58:20 UTC

Upstream has a patch:

* https://github.com/php/php-src/commit/3a144d3f7f6bad308e2bf112ebf16829eb298f20

Also, new releases tagged upstream:

* https://github.com/php/php-src/blob/php-7.2.13/NEWS
* https://github.com/php/php-src/blob/php-7.1.25/NEWS
* https://github.com/php/php-src/blob/php-7.0.33/NEWS
* https://github.com/php/php-src/blob/php-5.6.39/NEWS

Please note the PHP-7.0 branch is now EOL'd.

Comment 3 Thomas Deutschmann (RETIRED) gentoo-dev

2020-03-26 13:23:13 UTC

Added to an existing GLSA request.

Comment 4 GLSAMaker/CVETool Bot gentoo-dev

2020-03-26 13:33:01 UTC

This issue was resolved and addressed in
 GLSA 202003-57 at https://security.gentoo.org/glsa/202003-57
by GLSA coordinator Thomas Deutschmann (whissi).