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TITLE:
Gentoo courier-imap "XMAILDIR" Variable Command Injection

SECUNIA ADVISORY ID:
SA24963

VERIFY ADVISORY:
http://secunia.com/advisories/24963/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

OPERATING SYSTEM:
Gentoo Linux 1.x
http://secunia.com/product/339/

DESCRIPTION:
Gentoo has acknowledged a vulnerability in courier-imap, which
potentially can be exploited by malicious people to compromise a
vulnerable system.

The vulnerability is caused due to incorrect handling of the
"XMAILDIR" variable in courier-imapd.indirect and
courier-pop3d.indirect. This may be exploited to e.g. execute
commands with root privileges by logging in with specially crafted
login data.

SOLUTION:
Update to "net-mail/courier-imap-4.0.6-r2" or later.

PROVIDED AND/OR DISCOVERED BY:
CJ Kucera.

ORIGINAL ADVISORY:
http://www.gentoo.org/security/en/glsa/glsa-200704-18.xml

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About:
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