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rsync File Handling Integer Overflow Vulnerability
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Secunia Advisory:
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SA10353
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Release Date:
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2003-12-04
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Last Update:
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2003-12-11
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Critical:
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Extremely critical
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Impact:
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System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | rsync 2.x
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| | CVE reference: | CVE-2003-0962 (Secunia mirror)
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Description:
A vulnerability has been identified in rsync, which can be exploited by malicious people to compromise a vulnerable system.
The vulnerability is caused due to an integer overflow in a memory handling routine, which can be exploited to cause a heap overflow by supplying an extremely large, specially crafted file.
Successful exploitation allows malicious people to execute arbitrary code on a vulnerable system with the privileges of the rsync server.
NOTE: This vulnerability has already been exploited to compromise servers on the Internet in combination with a Linux privilege escalation vulnerability.
See the following advisory for more information on the Linux privilege escalation vulnerability:
SA10328
Solution:
Update to version 2.5.7.
http://samba.org/rsync/download.html
When possible, filter traffic to the rsync service (port 873/tcp) allowing only trusted systems to connect.
Secunia furthermore recommends that the chroot functionality is used as a defense in depth precaution to lessen impact of exploitation (enabled by default).
Changelog:
2003-12-11: Added more information.
Other References:
SA10328:
http://secunia.com/advisories/10328/
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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.
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6 Related Secunia Security Advisories
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1. rsync "xattr" Integer Overflow Vulnerability
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2. rsync Two Security Bypass Vulnerabilities
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3. rsync "f_name()" Off-By-One Vulnerability
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4. Rsync "xattrs.diff" Patch Integer Overflow Vulnerability
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5. Rsync Path Sanitation Vulnerability
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6. rsync Allows Writing Files Outside the Intended Directory
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If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.
Ideas, suggestions, and other feedback are most welcome.
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