Two vulnerabilities have been identified in Microsoft Windows, which could be exploited by attackers to bypass security restrictions.
The first issue is caused 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, which could allow spoofing attacks.
The second vulnerability is caused by an integer overflow error in the Windows CryptoAPI when parsing ASN.1 object identifiers from X.509 certificates (e.g. Common Name), which could allow an attacker to generate a malicious certificate that would be parsed incorrectly by the Windows CryptoAPI, impersonating another user or system.
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