SSL: Microsoft IIS SChannel Improper Certificate Verification
This signature detects attempts to exploit a known vulnerability in the Microsoft Internet Information Server (IIS). The vulnerability is due to the improper way IIS handles Client Certificate Mapping. A successful attack attempt will allow the attacker to use another user's client certificate without the proper private key.
Extended Description
The Secure Channel (aka SChannel) authentication component in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP1 and SP2, Vista Gold and SP1, and Server 2008, when certificate authentication is used, does not properly validate the client's key exchange data in Transport Layer Security (TLS) handshake messages, which allows remote attackers to spoof authentication by crafting a TLS packet based on knowledge of the certificate but not the private key, aka "SChannel Spoofing Vulnerability."
Affected Products
Microsoft windows_vista
References
CVE: CVE-2009-0085
Short Name
SSL:SCHANNEL-IMPROPER-CERT
Severity
Minor
Recommended
False
Recommended Action
None
Category
SSL
Keywords
CVE-2009-0085 Certificate IIS Improper Microsoft SChannel Verification
Release Date
01/08/2013
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3659
False Positive
Unknown
Vendors
Microsoft
CVSS Score
7.1