CERT-In Vulnerability Note
CIVN-2015-0301
Multiple Vulnerabilities in Microsoft Silverlight
Original Issue Date:December 09, 2015
Severity Rating: HIGH
Software Affected
- Microsoft Silverlight 5
- Microsoft Silverlight 5 Developer Runtime
Overview
Multiple vulnerabilities has been reported in Microsoft Silverlight which could allow a remote attacker to gain sensitive information or execute arbitrary code on the target system.
Description
1. Arbitrary Code Execution Vulnerability
(
CVE-2015-6166
)
This vulnerability exists in Microsoft Silverlight due to improper handling of certain open and close web requests by the affected application. A remote attacker could exploit this vulnerability by enticing the user to visit a website that contains specially crafted Silverlight content. Successful exploitation of this vulnerability could allow the attacker to execute arbitrary code in the security context of the targeted user.
2. Information Disclosure Vulnerabilities
(
CVE-2015-6165
CVE-2015-6114
)
These vulnerabilities exist in Microsoft Silverlight due to improper handling of objects in memory by the affected application. A remote attacker could exploit this vulnerability by enticing the user to visit a website that contains specially crafted Silverlight content. Successful exploitation of this vulnerability could allow the attacker to more reliably predict pointer values and degrade the efficacy of the Address Space Layout Randomization (ASLR) feature.
Workaround
- Temporarily prevent Microsoft Silverlight from running in Internet Explorer
- Temporarily prevent Microsoft Silverlight from running in Mozilla Firefox
- Remove Silverlight.Configuration.exe from the IE Elevation Policy
Solution
Apply appropriate updates as mentioned in the Microsoft Security Bulletin
MS15-129
Vendor Information
Microsoft
https://technet.microsoft.com/en-us/library/security/ms15-129.aspx
References
Microsoft
https://technet.microsoft.com/en-us/library/security/ms15-129.aspx
Security Focus
http://www.securityfocus.com/bid/78504
http://www.securityfocus.com/bid/78505
http://www.securityfocus.com/bid/78502
Cisco
http://tools.cisco.com/security/center/viewAlert.x?alertId=42398
http://tools.cisco.com/security/center/viewAlert.x?alertId=42397
http://tools.cisco.com/security/center/viewAlert.x?alertId=42396
CVE Name
CVE-2015-6166
CVE-2015-6165
CVE-2015-6114
Disclaimer
The information provided herein is on "as is" basis, without warranty of any kind.
Contact Information
Email: info@cert-in.org.in
Phone: +91-11-24368572
Postal address
Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India
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