CVE-2018-19518
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OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics.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.
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| debian debian_linux | 8.0, 9.0 | — |
| php php | 5.6.0 ≤ v ≤ 5.6.38, 7.0.0 ≤ v ≤ 7.0.32, 7.1.0 ≤ v ≤ 7.1.24, 7.2.0 ≤ v ≤ 7.2.12 | — |
| uw-imap_project uw-imap | 2007f | — |
| canonical ubuntu_linux | 16.04, 18.04, 19.04 | — |
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