[Full-disclosure] [ GLSA 200605-05 ] rsync: Potential integer overflow

2006-05-0600:00:00

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Gentoo Linux Security Advisory GLSA 200605-05

                                        http://security.gentoo.org/

Severity: High
Title: rsync: Potential integer overflow
Date: May 06, 2006
Bugs: #131631
ID: 200605-05

Synopsis

An attacker having write access to an rsync module might be able to
execute arbitrary code on an rsync server.

Background

rsync is a server and client utility that provides fast incremental
file transfers. It is used to efficiently synchronize files between
hosts and is used by emerge to fetch Gentoo's Portage tree.

Affected packages

-------------------------------------------------------------------
 Package         /  Vulnerable  /                       Unaffected
-------------------------------------------------------------------

1 net-misc/rsync < 2.6.8 >= 2.6.8

Description

An integer overflow was found in the receive_xattr function from the
extended attributes patch (xattr.c) for rsync. The vulnerable function
is only present when the "acl" USE flag is set.

Impact

A remote attacker with write access to an rsync module could craft
malicious extended attributes which would trigger the integer overflow,
potentially resulting in the execution of arbitrary code with the
rights of the rsync daemon.

Workaround

Do not provide write access to an rsync module to untrusted parties.

Resolution

All rsync users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-misc/rsync-2.6.8&quot;

References

[ 1 ] CVE-2006-2083
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2083

Availability

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200605-05.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
[email protected] or alternatively, you may file a bug at
http://bugs.gentoo.org.