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Microsoft Windows CryptoAPI X.509 Spoofing Vulnerabilities (974571)

Information

Severity

Severity

High

Family

Family

Windows : Microsoft Bulletins

CVSSv2 Base

CVSSv2 Base

7.5

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

14 years ago

Modified

Modified

4 years ago

Summary

This host is missing a critical security update according to Microsoft Bulletin MS09-056.

Insight

Insight

- The issue is due to the Windows CryptoAPI incorrectly parsing a null terminator as the end of any values identified by an Object Identifier (OID) when processing ASN.1 information from X.509 certificates. - An integer overflow error in the Windows CryptoAPI when parsing ASN.1 object identifiers from X.509 certificates, which could allow an attacker to generate a malicious certificate that would be parsed incorrectly by the Windows CryptoAPI.

Affected Software

Affected Software

Microsoft Windows 7 Microsoft Windows 2K Service Pack 4 and prior. Microsoft Windows XP Service Pack 3 and prior. Microsoft Windows 2K3 Service Pack 2 and prior. Microsoft Windows Vista Service Pack 1/2 and prior. Microsoft Windows Server 2008 Service Pack 1/2 and prior.

Solution

Solution

The vendor has released updates. Please see the references for more information.

Common Vulnerabilities and Exposures (CVE)