GLSA-200704-18 : Courier-IMAP: Remote execution of arbitrary code
High Nessus Plugin ID 25106
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200704-18 (Courier-IMAP: Remote execution of arbitrary code)
CJ Kucera has discovered that some Courier-IMAP scripts don't properly handle the XMAILDIR variable, allowing for shell command injection.
A remote attacker could send specially crafted login credentials to a Courier-IMAP server instance, possibly leading to remote code execution with root privileges.
There is no known workaround at this time.
SolutionAll Courier-IMAP users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-mail/courier-imap-4.0.6-r2'