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SSL Issue with security.ssl3.dhe_rsa_aes_128_sha

  • 3 odgovora
  • 1 ima ovaj problem
  • 1 prikaz
  • Posljednji odgovor od cjratliff

cjratliff
cjratliff
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I am having an issue where I have an internal site (WebLogic App) that has SSL. Firefox fails to open:

An error occurred during a connection to trobiee01.ecapitaladvisors.com:7002. SSL received a weak ephemeral Diffie-Hellman key in Server Key Exchange handshake message. Error code: SSL_ERROR_WEAK_SERVER_EPHEMERAL_DH_KEY

However, when I toggle the setting security.ssl3.dhe_rsa_aes_128_sha to 'false' the site opens. I would like to know why and what is the issue with the web application. Please assist.

I am having an issue where I have an internal site (WebLogic App) that has SSL. Firefox fails to open: An error occurred during a connection to trobiee01.ecapitaladvisors.com:7002. SSL received a weak ephemeral Diffie-Hellman key in Server Key Exchange handshake message. Error code: SSL_ERROR_WEAK_SERVER_EPHEMERAL_DH_KEY However, when I toggle the setting security.ssl3.dhe_rsa_aes_128_sha to 'false' the site opens. I would like to know why and what is the issue with the web application. Please assist.

Svi odgovori (3)

James
James
  • Moderator
  • Top 10 Contributor
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This indicates that the site is defaulting to an obsolete encryption cipher which is vulnerable to the "Logjam" attack that was in the news earlier this year.

https://support.mozilla.org/en-US/questions/1073420

cjratliff
cjratliff Vlasnik pitanja
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It appears the cipher suite it is defaulting to is:

TLS_RSA_WITH_AES_128_CBC_SHA

I am assuming this is vulnerable to logjam as well?

cjratliff
cjratliff Vlasnik pitanja
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When set the cipher to 'false' is it in effect disabling TLS_DHE_RSA_WITH_AES_128_CBC_SHA and allowing TLS_RSA_WITH_AES_128_CBC_SHA instead?

Thank you in advance