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Insecure Library Loading
Moderately critical

Microsoft Windows CryptoAPI Two Spoofing Vulnerabilities

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Description


Two vulnerabilities have been reported in Microsoft Windows, which can be exploited by malicious people to conduct spoofing attacks.

1) An error exists in the processing of ASN.1 information from X.509 certificates. This can be exploited to spoof trust information presented to the user with a certificate containing e.g. via a NULL byte in the Common Name field.

2) An integer overflow error exists in the parsing of ASN.1 object identifiers from X.509 certificates. This can be exploited to spoof trust information presented to the user with a certificate containing a specially crafted Object Identifiers (OID).


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
The vendor credits Dan Kaminsky of IOActive.

Original Advisory:
MS09-056 (KB974571):
http://www.microsoft.com/technet/security/bulletin/MS09-056.mspx

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Microsoft Windows CryptoAPI Two Spoofing Vulnerabilities

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