SSL server low key strength ciphers first
| ssl-weak-cipher-choice (31423) |  Medium Risk |
Description:
Servers and clients use X.509 certificates when establishing communication using Secure Sockets Layer (SSL). During the initial connection setup the client provides a list, in its preferred order, of ciphers that it supports. The server should choose the strongest cipher the client supports as the session encryption method. Some server misconfigurations cause the server to choose low key strength ciphers if they appear early in the preference list, even if the client supports higher strength encryption.
Platforms Affected:
- Apache, HTTP Server
- Apple, Mac OS X
- Compaq, Tru64
- Data General, DG/UX
- HP, HP-UX
- IBM, AIX
- IBM, OS2
- Linux, Kernel
- Microsoft, IIS
- Microsoft, Windows 2000
- Microsoft, Windows 2003 Server
- Microsoft, Windows 95
- Microsoft, Windows 98
- Microsoft, Windows 98SE
- Microsoft, Windows Me
- Microsoft, Windows NT 4.0
- Microsoft, Windows XP
- OpenSSL, OpenSSL
- SCO, SCO Unix
- SGI, IRIX
- Sun, Solaris
- WindRiver, BSDOS
Remedy:
Consult the server documentation to disable weak ciphers completely or force the server to use strong encryption first.
Consequences:
Obtain Information
References:
- WindowSecurity.com Web site, Secure Socket Layer at http://www.windowsecurity.com/articles/Secure_Socket_Layer.html.
Reported:
Not available
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