Signature Detail

HTTP: Microsoft Telnet Protocol Handler Insecure Loading

This signature detects attempts to exploit a known remote code execution vulnerability in the Microsoft telnet.exe service. It is due to a design weakness in the way telnet protocol handler is implemented. Remote attackers can exploit this by enticing target users to download a malicious dll file. A successful attack can result in loading the attacker-controlled library and execution of arbitrary code with the privileges of the logged-in user. If a user is logged-on with administrative user rights, an attacker can take complete control of the affected system.

Extended Description

Microsoft Internet Explorer is prone to a vulnerability that lets attackers execute arbitrary remote code. An attacker can exploit this issue by enticing a legitimate user to use a vulnerable version of the application to access an HTML file from a network share location that contains a specially crafted executable file.

Affected Products

• Avaya Aura Conferencing 6.0 Standard
• Avaya CallPilot 4.0
• Avaya CallPilot 5.0
• Avaya Communication Server 1000 Telephony Manager 3.0
• Avaya Communication Server 1000 Telephony Manager 4.0
• Avaya Meeting Exchange 5.0
• Avaya Meeting Exchange 5.0.0.0.52
• Avaya Meeting Exchange 5.0 SP1
• Avaya Meeting Exchange 5.0 SP2
• Avaya Meeting Exchange 5.1
• Avaya Meeting Exchange 5.1 SP1
• Avaya Meeting Exchange 5.2
• Avaya Meeting Exchange 5.2 SP1
• Avaya Meeting Exchange 5.2 SP2
• Avaya Meeting Exchange - Client Registration Server
• Avaya Meeting Exchange - Recording Server
• Avaya Meeting Exchange - Streaming Server
• Avaya Meeting Exchange - Web Conferencing Server
• Avaya Meeting Exchange - Webportal
• Avaya Messaging Application Server 4
• Avaya Messaging Application Server 5
• Avaya Messaging Application Server 5.2
• Microsoft Internet Explorer 6.0
• Microsoft Internet Explorer 7.0
• Microsoft Internet Explorer 8
• Microsoft Internet Explorer 9

References

• BugTraq: 49027
• CVE: CVE-2011-1961