Signature Detail
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Short Name |
SSL:X509-CN-NULL-BYTE |
|---|---|
Severity |
Major |
Recommended |
No |
Recommended Action |
Drop |
Category |
SSL |
Keywords |
X.509 Common Name(CN) Null Byte Truncation |
Release Date |
2014/04/16 |
Update Number |
2365 |
Supported Platforms |
idp-4.0+, isg-3.0+, j-series-9.5+, mx-11.4+, srx-12.1+, srx-branch-12.1+, vmx-17.4+, vsrx-12.1+, vsrx3bsd-18.2+ |
SSL: X.509 Common Name(CN) Null Byte Truncation
This signature detects attempts to exploit a known vulnerability in X.509 certificates. A successful attack allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.
Extended Description
The CryptoAPI component in Microsoft Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7, as used by Internet Explorer and other applications, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, aka "Null Truncation in X.509 Common Name Vulnerability," a related issue to CVE-2009-2408.
Affected Products
- Microsoft windows_2000 *
- Microsoft windows_2003_server *
- Microsoft windows_7 -
- Microsoft windows_server_2008 -
- Microsoft windows_server_2008 *
- Microsoft windows_vista *
- Microsoft windows_xp -
- Microsoft windows_xp *
References
- BugTraq: 36475
- CVE: CVE-2009-2510