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rsync "xattr" Integer Overflow Vulnerability Advisory Available in German 

Secunia Advisory: SA29668  
Release Date: 2008-04-11

Critical:
Moderately critical
Impact: DoS
System access
Where: From remote
Solution Status: Vendor Patch

Software:rsync 2.x
rsync 3.x

CVE reference:CVE-2008-1720 (Secunia mirror)

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Description:
A vulnerability has been reported in rsync, which can potentially be exploited by malicious users to cause a DoS (Denial of Service) or to compromise a vulnerable system.

The vulnerability is caused due to an integer overflow error within the extended attributes (xattr) support and can be exploited to cause a buffer overflow.

Successful exploitation may allow execution of arbitrary code, but requires that the extended attributes support is enabled.

The vulnerability is reported in version 2.6.9 through 3.0.1.

NOTE: Version 2.6.9 had to be patched to support extended attributes.

Solution:
Update to version 3.0.2 or apply patch.
http://samba.anu.edu.au/rsync/download.html
http://rsync.samba.org/ftp/rsync/security/rsync-3.0.1-xattr-alloc.diff

Provided and/or discovered by:
The vendor credits Sebastian Krahmer.

Original Advisory:
http://samba.anu.edu.au/rsync/security.html#s3_0_2
http://www.mail-archive.com/rsync-announce@lists.samba.org/msg00057.html



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

6 Related Secunia Security Advisories

1. rsync Two Security Bypass Vulnerabilities
2. rsync "f_name()" Off-By-One Vulnerability
3. Rsync "xattrs.diff" Patch Integer Overflow Vulnerability
4. Rsync Path Sanitation Vulnerability
5. rsync Allows Writing Files Outside the Intended Directory
6. rsync File Handling Integer Overflow Vulnerability


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Ideas, suggestions, and other feedback are most welcome.








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