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.
Consequences:
Obtain Information
Remedy:
Consult the server documentation to disable weak ciphers completely or force the server to use strong encryption first.
References:
- WindowSecurity.com Web site: Secure Socket Layer.
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 Internet Information Services
- 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
Reported:
Not available
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For corrections or additions please email xforce@iss.net