TITLE:
sa-exim "greylistclean.cron" File Deletion Vulnerability

SECUNIA ADVISORY ID:
SA19225

VERIFY ADVISORY:
http://secunia.com/advisories/19225/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
sa-exim 4.x
http://secunia.com/product/8697/

DESCRIPTION:
Chris Morris has reported a vulnerability in sa-exim, which
potentially can be exploited by malicious people to bypass certain
security restrictions.

The vulnerability is caused due to an error in "greylistclean.cron"
when deleting files containing spaces in their filenames in the
greylist cache directory. This can potentially be exploited to delete
files on the system via an email with a specially-crafted email
address.

The vulnerability has been reported in version 4.2. Prior versions
may also be affected.

SOLUTION:
The vulnerability has been fixed in version 4.2.1 in the CVS
repositories.

PROVIDED AND/OR DISCOVERED BY:
Chris Morris

ORIGINAL ADVISORY:
http://marc.merlins.org/linux/exim/files/sa-exim-cvs/Changelog.html
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=345071

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