Cisco Unified Communications Manager - Multiple Vulnerabilities

Vantage Point Security Advisory 2015-001

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Title: Cisco Unified Communications Manager Multiple Vulnerabilities

Vendor: Cisco

Vendor URL: http://www.cisco.com/

Versions affected:  <9.2, <10.5.2, <11.0.1.

Severity: Low to medium

Vendor notified: Yes

Reported: Oct. 2014

Public release: Aug. 13th, 2015

Author: Bernhard Mueller <bernhard[at]vantagepoint[dot]sg>



Summary:

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Cisco Unified Communications Manager (CUCM) offers services such as session

management, voice, video, messaging, mobility, and web conferencing.



During the last year, Vantage Point Security has reported four security

issues to Cisco as listed below.





1. Shellshock command injection

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Authenticated users of CUCM can access limited functionality via the web

interface and Cisco console (SSH on port 22). Because the SSH server is

configured to process several environment variables from the client and a

vulnerable version of bash is used, it is possible to exploit command

injection via specially crafted environment variables (CVE-2014-6271 a.k.a.

shellshock). This allows an attacker to spawn a shell running as the user

"admin".





Several environment variables can be used to exploit the issue. Example:





$ LC_PAPER="() { x;};/bin/sh" ssh Administrator@examplecucm.com





2. Local File Inclusion

-----------------------



The application allows users to view the contents of any locally accessible

files on the web server through a vulnerability known as LFI (Local File

Inclusion). LFI vulnerabilities are commonly used to download application

source code, configuration files and files containing sensitive information

such as passwords. Exploiting this issue requires a valid user account.





https://cucm.example.com/:8443/reporter-servlet/GetFileContent?Location=/&FileName=/usr/local/thirdparty/jakarta-tomcat/conf/tomcat-users.xml





3. Unauthenticated access to ping command

-----------------------------------------



The pingExecute servlet allows unauthenticated users to execute pings to

arbitrary IP addresses. This could be used by an attacker to enumerate the

internal network. The following URL triggers a ping of the host 10.0.0.1:



https://cucm.example.com:8443/cmplatform/pingExecute?hostname=10.0.0.1&interval=1.0&packetsize=12&count=1000&secure=false





4. Magic session ID allows unauthenticated access to SOAP calls

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Authentication for some methods in the EPAS SOAP interface can be bypassed

by using a hardcoded session ID. The methods "GetUserLoginInfoHandler" and

"GetLoggedinXMPPUserHandler" are affected.





Fix Information:

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Upgrade to CUCM version 9.2, 10.5.2 or 11.0.1.





References:

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https://tools.cisco.com/quickview/bug/CSCus88031

https://tools.cisco.com/quickview/bug/CSCur49414

https://tools.cisco.com/quickview/bug/CSCum05290

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140926-bash

http://tools.cisco.com/security/center/viewAlert.x?alertId=37111





Timeline:

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2014/10: Issues reported to Cisco;

2015/07: Confirm that all issues have been fixed.





About Vantage Point Security:

--------------------



Vantage Point is the leading provider for penetration testing and security

advisory services in Singapore. Clients in the Financial, Banking and

Telecommunications industries select Vantage Point Security based on

technical competency and a proven track record to deliver significant and

measurable improvements in their security posture.



https://www.vantagepoint.sg/

office[at]vantagepoint[dot]sg