From: Secunia Security Advisories (sec-advsecunia.com)
Date: Fri Nov 30 2007 - 17:17:04 CST

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TITLE:
rsync Two Security Bypass Vulnerabilities

SECUNIA ADVISORY ID:
SA27863

VERIFY ADVISORY:
http://secunia.com/advisories/27863/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
From remote

SOFTWARE:
rsync 2.x
http://secunia.com/product/2594/

DESCRIPTION:
Two vulnerabilities have been reported in rsync, which can be
exploited by malicious users to bypass certain security
restrictions.

1) An error in the rsync daemon when the "use chroot" option is
disabled can be exploited to gain access to files outside of the
module's hierarchy via symlink attacks.

2) An error exists within the enforcing of the "exclude", "exclude
from", and "filter" options. This can be exploited to bypass access
restrictions and gain access to hidden files via e.g. symlink
attacks, if the filename is known.

The vulnerabilities are reported in version 2.6.9. Prior versions may
also be affected.

SOLUTION:
Apply vendor patch.
http://rsync.samba.org/ftp/rsync/munge-symlinks-2.6.9.diff

The vendor recommends users to read the "munge symlinks" section
contained within the updated rsyncd.conf manpage.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://rsync.samba.org/security.html

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