CVE-2018-19518

Public on 2019-01-09
Modified on 2019-01-12
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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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.
Severity
Medium
CVSS v3 Base Score
8.1
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 php70 2019-01-09 22:58 ALAS-2019-1147
Amazon Linux 1 php56 2019-01-09 22:58 ALAS-2019-1147
Amazon Linux 1 php71 2019-01-09 22:58 ALAS-2019-1147
Amazon Linux 1 php72 2019-01-09 22:58 ALAS-2019-1147

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv2 8.5 AV:N/AC:M/Au:S/C:C/I:C/A:C
NVD CVSSv3 7.5 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H