A flaw was found in one of the Media Application Server listening processes. If a remote attacker was able to successfully establish a connection to this listening process, it would be possible to execute arbitrary code under the context of the SYSTEM user. The Zero Day Initiative project (www.zerodayinitiative.com) has assigned the name ZDI-11-260 to this issue.
Avaya would like to thank the Zero Day Initiative and AbdulAziz Hariri of ThirdEyeTesters for responsibly reporting this vulnerability.
|Product:||Affected Version(s):||Risk Level:||Actions:|
|Avaya Aura® Application Server 5300:
||1.0, 2.0||Medium||MAS 2.0 users install Patch Bundle 10 or later.
MAS 1.0 users upgrade to 1.0.2 (MCP_220.127.116.11_2011-01-07-1526 with MAS QFE patch: QFE-platform-6.0.244-0001.zip), or upgrade to MAS 2.0 with Patch Bundle 10 or later.
Recommended Actions for System Products:
Avaya strongly recommends that customers follow networking and security best practices by implementing firewalls, ACLs, physical security or other appropriate access restrictions. Though Avaya believes such restrictions should always be in place, risk to Avaya products and the surrounding network from this potential vulnerability may be mitigated by ensuring these practices are implemented until such time as an Avaya provided product update or the recommended Avaya action is applied. Further restrictions as deemed necessary based on the customer's security policies may be required during this interim period, but customers should not modify the System Product operating system or application unless the change is approved by Avaya. Making changes that are not approved may void the Avaya product service contract.
When determining risk, Avaya takes into account many factors as outlined by Avaya's Security Vulnerability Classification Policy. The following table describes factors that mitigate the risk of specific vulnerabilities for affected Avaya products:
|ZDI-CAN-1096||This is a medium risk because all known deployments of Media Application Server require mutual TLS authentication to access the service affected by this vulnerability. Media Application Server 2.0 further limits access to the affected service with the use of ACLs.|
Additional information may also be available via the Avaya support website and through your Avaya account representative. Please contact your Avaya product support representative, or dial 1-800-242-2121, with any questions.
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V 1.0 - August 2, 2011 - Initial Statement issued.
V 2.0 - August 30, 2011 - Updated the ZDI link.
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