Vulnerability Alert

Cisco Unified IP Phones Local Kernel System Call Input Validation Vulnerability

 
Threat Type:CWE-20: Input Validation
IntelliShield ID:27800
Version:2
First Published:2013 January 09 16:10 GMT
Last Published:2013 January 17 16:18 GMT
Port: Not available
CVE:CVE-2012-5445
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:6.8 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:5.8
 
Version Summary:Cisco has re-released a security advisory and an Engineering Special release to address the Cisco Unified IP Phones local kernel system call input validation vulnerability.
 
 
Description
Cisco Unified IP Phones 7900 Series versions 9.3(1)SR1 and prior contain an arbitrary code execution vulnerability that could allow a local attacker to execute code or modify arbitrary memory with elevated privileges.

This vulnerability is due to a failure to properly validate input passed to kernel system calls from applications running in userspace. An attacker could exploit this issue by gaining local access to the device using physical access or authenticated access using SSH and executing an attacker-controlled binary that is designed to exploit the issue. Such an attack would originate from an unprivileged context.

Cisco has confirmed the vulnerability in a security advisory and released updated software.
 
Warning Indicators
Cisco 7900 Series Unified IP Phone is affected.
 
IntelliShield Analysis
This alert contains CVSS scoring supplied by Cisco, the primary vendor of the affected product. 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 bug ID CSCuc83860 at the following link: cisco-sa-20130109-uipphone
 
Impact
A local attacker could exploit this vulnerability to modify the operation of existing code or execute attacker-controlled code with elevated privileges.
 
Technical Information
The vulnerability is due to insufficient validation of input passed to kernel system calls from applications running in userspace.

An attacker could exploit this issue by gaining physical access to the device via the AUX port on the rear of the device or gaining remote access by first authenticating to the device via SSH and executing a crafted binary. When the malicious binary executes, the attacker could bypass the speakerphone activated indicator light and activate the handset microphone while the device handset is in the on-hook position (with the handset in the cradle). A successful exploit could allow the attacker to intercept in-range audio communications. The remote access method is disabled by default on the device after it has been provisioned by a Cisco Unified Call Manager.
 
Safeguards
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:
Identifying and Mitigating Exploitation of the Cisco Unified IP Phone Local Kernel System Call Input Validation Vulnerability

Administrators are advised to apply the appropriate updates.

Administrators are advised to monitor affected systems.
 
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.
 
Alert History
 
Version 1, January 9, 2013, 11:16 AM: Cisco Unified IP Phones 7900 Series contains a vulnerability that could allow a local attacker to execute code or modify arbitrary memory with elevated privileges. Updates are not available.


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

Primary Products:
CiscoCisco Unified IP Phone 7906G 7.2 (3) | 8.0 (3), (4), (4)SR1, (4)SR2, (4)SR3A | 8.2 (1), (2), (2) SR1, (2) SR2, (2) SR4, (2) SR3 | 8.3 (1), (2), (2) SR1, (2) SR2, (2) SR3, (2) SR4, (3), (3) SR2 | 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7911G 7.2 (1), (2)SR2, (3) | 8.0 (1), (2)SR2, (3), (4)SR1, (4)SR2, (4)SR3A | 8.2 (1), (2) SR1, (2) SR2, (2) SR3, (2) SR4 | 8.3 (1), (2), (2) SR1, (3), (3) SR2 | 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7931G 8.3 (1), (2), (2)SR1, (3), (3) SR2 | 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7941G 7.0 (2), (2)SR1, (3) | 8.0 (1), (2)SR1, (3), (4), (4)SR1, (4)SR2, (4)SR3A | 8.2 (1), (2) SR1, (2) SR2, (2) SR3, (2) SR4 | 8.3 (1), (2), (2) SR1, (3), (3) SR2 | 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7942G 8.3 (2), (2) SR1, (3), (3) SR2 | 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7945G 8.3 (2), (2) SR1, (3), (3) SR2 | 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7961G 7.0 (2), (2) SR1, (3) | 8.0 (1), (2)SR1, (3), (4)SR1, (4)SR2, (4)SR3A | 8.2 (1), (2) SR1, (2) SR2, (2) SR3, (2) SR4 | 8.3 (1), (2), (2) SR1, (3), (3) SR2 | 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7962G 8.3 (2), (2) SR1, (3), (3) SR2 | 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7965G 8.3 (2), (2) SR1, (3), (3) SR2 | 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7970G 5.0 (1), (3) | 6.0 (1), (1)SR1, (2), (2)SR1, (3)SR1 | 7.0 (1), (2), (2)SR1, (3) | 8.0 (1), (2)SR1, (3), (4)SR1, (4)SR2, (4)SR3A | 8.3 (1), (2), (2) SR1, (3), (3) SR2 | 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7971G-GE 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7961G-GE 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7941G-GE 9.0 9.0(2)SR1, 9.0(2)SR2, 9.0(3), 9.1(1)SR1, 9.2(1)
CiscoCisco Unified IP Phone 7975G 8.3(2) Base, SR1 | 8.3(3) Base, SR2 | 8.3(4) Base, SR1 | 8.3(5) Base | 8.4(1) Base, SR1, SR2 | 8.4(2) Base | 8.4(3) Base | 8.4(4) Base | 8.5(2) Base, SR1 | 8.5(3) Base, SR1 | 8.5(4) Base | 9.0(2) Base, SR1, SR2 | 9.0(3) Base | 9.1(1) Base, SR1 | 9.2(1) Base, SR2 | 9.2(3) Base | 9.3(1) Base, SR1

Associated Products:
N/A




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