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Research > Zero-Day Tracker > 20130109

Cisco Unified IP Phone System Call Vulnerability

Date Disclosed:

Date Patched:

Cisco Systems, Inc.

Affected Software:

Cisco Unified IP Phone 7906
Cisco Unified IP Phone 7911G
Cisco Unified IP Phone 7931G
Cisco Unified IP Phone 7941G
Cisco Unified IP Phone 7941G-GE
Cisco Unified IP Phone 7942G
Cisco Unified IP Phone 7945G
Cisco Unified IP Phone 7961G
Cisco Unified IP Phone 7961G-GE
Cisco Unified IP Phone 7962G
Cisco Unified IP Phone 7965G
Cisco Unified IP Phone 7970G
Cisco Unified IP Phone 7971G-GE
Cisco Unified IP Phone 7975G

7900 Series Cisco Unified IP Phones contain a vulnerability that can allow for arbitrary code execution. This vulnerability is caused by a failure to validate input passed to kernel system calls from user applications. An attacker could leverage this vulnerability either by gaining physical access to the vulnerable device, or access it through SSH.


Code Execution:

Remote Code Execution
Exploitation of this vulnerability is possible via maliciously crafted usermode applications. Attackers who successfully exploit this vulnerability will be able to execute code on the vulnerable system with the same rights as the currently logged on user.

Apply general service release 9.3(1)SR2. If the patch cannot be applied, Cisco recommends disabling the Cisco Unified IP Phone SSH server and setup encrypted phone configuration files. 

BeyondTrust's Retina® Network Security Scanner scans devices to detect for this vulnerability.

  • 18006 - Cisco Unified IP Phone System Call Vulnerability


2013-01-09 - Cisco releases public advisory
2013-02-14 - Cisco releases general service release 9.3(1)SR2 to address the vulnerability

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