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Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')

CVE-2010-4180

Medium
4.3/10

Summary

OpenSSL before 0.9.8q, and 1.0.x before 1.0.0c, when "SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG" is enabled, does not properly prevent modification of the ciphersuite in the session cache, which allows remote attackers to force the downgrade to an unintended cipher via vectors involving sniffing network traffic to discover a session identifier.

  • MEDIUM
  • NETWORK
  • NONE
  • PARTIAL
  • NONE
  • NONE

CWE-757 - Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')

A protocol or its implementation supports interaction between multiple actors and allows those actors to negotiate which algorithm should be used as a protection mechanism such as encryption or authentication, but it does not select the strongest algorithm that is available to both parties.

References

Advisory Timeline

  • Published