OpenSLP denial of service vulnerability

Overview

OpenSLP contains a vulnerability in the handling of packets containing malformed extensions, which can result in a denial-of-service condition.

Description

Service Location Protocol is an IETF standards track protocol that provides a framework to allow networking applications to discover the existence, location, and configuration of networked services in enterprise networks. The OpenSLP project is an effort to develop an open-source implementation of Service Location Protocol. When OpenSLP parses a SLP packet containing malformed extensions the extensions parser will enter an infinite loop causing a denial-of-service condition.

If an attacker creates a packet containing a “next extension offset” pointing to itself or to a previous extension, the extension’s parser will enter an infinite loop consuming 100% of the CPU.

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Impact

A remote unauthenticated attacker may be able to create a denial-of-service condition.

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Solution

Upgrade or apply a patch from the vendor

Patches and updated versions of the software have been released to address this issue. Please see the Vendor Information section of this document for more information.

Users who compile their OpenSLP software from the svn distribution should checkout to the latest svn revision. According to the revision update this vulnerability has been resolved in revision 1647.

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Vendor Information

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Novell, Inc. Affected

Notified: August 11, 2010 Updated: January 14, 2011

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

• <http://support.novell.com/security/cve/CVE-2010-3609.html&gt;

SUSE Linux Affected

Notified: October 07, 2010 Updated: March 21, 2011

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

• <http://support.novell.com/security/cve/CVE-2010-3609.html&gt;

Ubuntu Affected

Updated: April 21, 2011

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

• <https://launchpad.net/ubuntu/+source/openslp-dfsg/1.2.1-7.7ubuntu0.1&gt;
• <https://launchpad.net/ubuntu/+source/openslp-dfsg/1.2.1-7.6ubuntu0.1&gt;
• <https://launchpad.net/ubuntu/+source/openslp-dfsg/1.2.1-7.5ubuntu0.1&gt;
• <https://launchpad.net/ubuntu/+source/openslp-dfsg/1.2.1-7.1ubuntu0.2&gt;
• <https://launchpad.net/ubuntu/+source/openslp/1.2.1-5ubuntu0.2&gt;

VMware Affected

Notified: August 12, 2010 Updated: March 16, 2011

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

• <http://www.vmware.com/security/advisories/VMSA-2011-0004.html&gt;

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• http://openslp.svn.sourceforge.net/viewvc/openslp?view=revision&revision=1647
• <http://support.novell.com/security/cve/CVE-2010-3609.html&gt;
• <http://www.vmware.com/security/advisories/VMSA-2011-0004.html&gt;

Acknowledgements

Thanks to Nicolas Gregoire of Agarri for reporting this vulnerability.

This document was written by Michael Orlando.

Other Information

CVE IDs:	CVE-2010-3609
Severity Metric:	0.58 Date Public: