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