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"Secure Connection failed" after update to firefox 39

  • 5 replies
  • 222 have this problem
  • 114289 views
  • Paskiausią atsakymą parašė jscher2000

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Hi, After update of firefox to version 39 i am unable to pay online bill, shopping bill etc and got this message "Secure Connection Failed

An error occurred during a connection to acs.onlinesbi.com. SSL received a weak ephemeral Diffie-Hellman key in Server Key Exchange handshake message. (Error code: ssl_error_weak_server_ephemeral_dh_key)

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

Report this error " Please help me how to fix this problem.Thanks.

Chosen solution

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.

You can disable these old ciphers in Firefox to try to force the site to up its game. Here's how:

(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.

(2) In the search box above the list, type or paste dhe and pause while the list is filtered

(3) Double-click the security.ssl3.dhe_rsa_aes_128_sha preference to switch it from true to false (disable Firefox from using this cipher)

(4) Double-click the security.ssl3.dhe_rsa_aes_256_sha preference to switch it from true to false (disable Firefox from using this cipher)

Then try your payment site again. Any improvement?

Skaityti atsakymą kartu su kontekstu 👍 199

All Replies (5)

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Chosen Solution

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.

You can disable these old ciphers in Firefox to try to force the site to up its game. Here's how:

(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.

(2) In the search box above the list, type or paste dhe and pause while the list is filtered

(3) Double-click the security.ssl3.dhe_rsa_aes_128_sha preference to switch it from true to false (disable Firefox from using this cipher)

(4) Double-click the security.ssl3.dhe_rsa_aes_256_sha preference to switch it from true to false (disable Firefox from using this cipher)

Then try your payment site again. Any improvement?

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Its working.Thank you very much Sir.

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I had exactly this same problem with this browser. now its solved. Thanks jscher2000.

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attempting to access https://community.landesk.com/support/docs/DOC-39460 I am running FireFox 42.0 Other people can access that site so the problem is my installation

On the above, and more than a few other sites, and I get Secure Connection Failed

I have edited about:config so that

 security.ssl3.dhe_rsa_aes_128_sha 
 security.ssl3.dhe_rsa_aes_256_sha 

are both FALSE. Restarted FireFox

No effect.

There are many security.ssl3 settings including

  security.ssl3.ecdhe_ecdsa_aes_128_sha;true

should I turn something else off?

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Hi Jonathan_Jaffe, could you start a new question? Since your problem is not caused by the Logjam issue, it presumably is something else personal to your configuration.

You can start a new question at the following link. Scroll down past the suggestions to continue submitting your question: https://support.mozilla.org/questions/new/desktop/fix-problems

Please mention any untrusted connection errors you may have seen on other sites, and whether you use any security software known to intercept secure connections for filtering (e.g., Avast, BitDefender, ESET, Kaspersky).