Arch Linux Security Advisory ASA-201804-8 ========================================= Severity: High Date : 2018-04-19 CVE-ID : CVE-2018-9846 Package : roundcubemail Type : arbitrary command execution Remote : Yes Link : https://security.archlinux.org/AVG-670 Summary ======= The package roundcubemail before version 1.3.6-1 is vulnerable to arbitrary command execution. Resolution ========== Upgrade to 1.3.6-1. # pacman -Syu "roundcubemail>=1.3.6-1" The problem has been fixed upstream in version 1.3.6. Workaround ========== Disable the archive plugin. Description =========== In Roundcube from versions 1.2.0 to 1.3.5, with the archive plugin enabled and configured, it's possible to exploit the unsanitized, user- controlled "_uid" parameter (in an archive.php _task=mail&_mbox=INBOX&_action=plugin.move2archive request) to perform an MX (IMAP) injection attack by placing an IMAP command after a %0d%0a sequence. NOTE: this is less easily exploitable in 1.3.4 and later because of a Same Origin Policy protection mechanism. Impact ====== A remote attacker is able to execute arbitrary IMAP commands via a specially crafted url. References ========== https://github.com/roundcube/roundcubemail/issues/6229 https://github.com/roundcube/roundcubemail/issues/6238 https://medium.com/@ndrbasi/cve-2018-9846-roundcube-303097048b0a https://roundcube.net/news/2018/04/11/security-update-1.3.6 https://security.archlinux.org/CVE-2018-9846