Microsoft Internet Explorer Extended Validation SSL Certificate Security Bypass Vulnerability

2014-07-08T00:00:00
ID SMNTC-68391
Type symantec
Reporter Symantec Security Response
Modified 2014-07-08T00:00:00

Description

Description

Microsoft Internet Explorer is prone to a security-bypass vulnerability. An attacker may exploit this issue to bypass EV SSL certificate guidelines by using a wildcard certificate. This may aid in further attacks.

Technologies Affected

  • Avaya Aura Conferencing 6.0 SP1 Standard
  • Avaya Aura Conferencing 6.0 Standard
  • Avaya CallPilot 4.0
  • Avaya CallPilot 4.0.1
  • Avaya CallPilot 5.0
  • Avaya CallPilot 5.0.1
  • Avaya CallPilot 5.1.0
  • Avaya Communication Server 1000 Telephony Manager 3.0
  • Avaya Communication Server 1000 Telephony Manager 3.0.1
  • Avaya Communication Server 1000 Telephony Manager 4.0
  • Avaya Communication Server 1000 Telephony Manager 4.0.1
  • 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 5.0
  • Avaya Messaging Application Server 5.0.1
  • Avaya Messaging Application Server 5.2
  • Avaya Messaging Application Server 5.2.1
  • Microsoft Internet Explorer 10
  • Microsoft Internet Explorer 11
  • Microsoft Internet Explorer 7.0
  • Microsoft Internet Explorer 8
  • Microsoft Internet Explorer 9

Recommendations

Run all software as a nonprivileged user with minimal access rights.
When possible, run all software as a user with minimal privileges and limited access to system resources. Use additional precautions such as restrictive environments to insulate software that may potentially handle malicious content.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This may indicate exploit attempts or activity that results from successful exploits.

Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Set web browser security to disable the execution of script code or active content.
Since a successful exploit of this issue requires malicious code to execute in web clients, consider disabling support for script code and active content within the client browser. Note that this mitigation tactic might adversely affect legitimate websites that rely on the execution of browser-based script code.

Updates are available. Please see the references or vendor advisory for more information.