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Vulnerability Alert

Cisco IOS Software SIP Packet Parsing Arbitrary Code Execution Vulnerability

 
Threat Type:CWE-94: Code Injection
IntelliShield ID:20065
Version:1
First Published:2010 March 24 16:11 GMT
Last Published:2010 March 24 16:11 GMT
Port: 5060, 5061
CVE:CVE-2010-0581
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:10.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:7.4
Related Resources:
View related Security AdvisoryView related IPS Signature
 
 
Version Summary:

Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.? Updates are available.

 
 
Description

Cisco IOS Software contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.

The vulnerability is due to errors in processing malformed Session Initiation Protocol (SIP) messages by an affected device.? An unauthenticated, remote attacker could exploit this vulnerability by sending a malicious request to the targeted device.? Successful exploitation could allow the attacker to execute arbitrary code.

Cisco confirmed the vulnerability in a security advisory and released updated software.

 
Warning Indicators

Cisco has published a list of affected Cisco IOS Software releases in the security advisory. The Vendor Announcements section of this alert contains a link to the advisory.

 
IntelliShield Analysis

Depending on site configurations, an attacker may require access to internal networks to exploit the vulnerability.? Some sites restrict voice services that require SIP protocol processing to separate physical or logical networks, making exploitation more difficult.? If an exploit is successful, the attacker could execute arbitrary commands on the device, possibly allowing the attacker to gain complete control over the device.

Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.

 
Vendor Announcements

Cisco has released a security advisory for Cisco bug ID CSCsz89904 at the following link: cisco-sa-20100324-sip

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on the device.

 
Technical Information

The vulnerability is due to errors in processing malformed SIP messages by an affected device.? An unauthenticated, remote attacker could exploit this vulnerability by sending a malicious SIP packet to a device via TCP and UDP ports 5060 or TCP port 5061.? Only devices with services that are configured to accept and process SIP network traffic are vulnerable to exploitation.? The processing of a malicious packet could trigger an error condition that the attacker could use to execute arbitrary code on the device with elevated privileges.

 
Safeguards

Administrators are advised to apply the available software updates.

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

Administrators may consider disabling SIP listening ports on devices that are not required to process voice network traffic.

Administrators are advised to implement an intrusion prevention system (IPS) or intrusion detection system (IDS) to help detect and prevent attacks that attempt to exploit this vulnerability.

Administrators are advised to monitor critical systems.

The Cisco Applied Intelligence team has created the following companion document to guide administrators in identifying and mitigating attempts to exploit this vulnerability prior to applying updated software: cisco-amb-20100324-voice

 
Patches/Software

Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via e-mail at tac@cisco.com.


Signatures
 
Cisco Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
24119/0Cisco CUBE SIP VulnerabilityS4792010 Mar 24 
Cisco Small Business IPS
Signature IDSignature NameReleaseLatest Release Date
SBIPS2010-000149/Cisco CUBE SIP VulnerabilitySBIPS0000052010 Jun 17 
 
Alert History
 

Initial Release



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
N/A

Associated Products:
CiscoIOS 12.4GC 12.4(22)GC1, 12.4(24)GC1 | 12.4T 12.4(22)T, 12.4(22)T1, 12.4(22)T2, 12.4(24)T, 12.4(24)T1 | 12.4YA 12.4(20)YA, 12.4(20)YA1, 12.4(20)YA2, 12.4(20)YA3 | 12.4YB 12.4(22)YB, 12.4(22)YB1




Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service. This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.


LEGAL DISCLAIMER
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
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