Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

ssl_error_no_cypher_overlap in Firefox developer edition, Warning Triangle in Firefox but working OK in Chrome

RichardCocks
RichardCocks
more options

When Browsing with Chrome to https://apollo.adc.uk.com the certificate shows fine and shows a SHA256 signed certificate.

In Firefox (36.0) it shows a grey warning triangle and the console shows "This site makes use of a SHA-1 Certificate; it's recommended you use certificates with signature algorithms that use hash functions stronger than SHA-1." and I cannot use firefox to show the certificate details.

In Firefox Developer Edition (38.0a2 (2015-03-01)) it shows an Error Page with Error code: ssl_error_no_cypher_overlap

We have been in contact with both our hosting company (who configure SSL termination on the LB) and the certificate issuers to ask for support but they report everything is OK as expected and they suspect a Firefox bug.

When Browsing with Chrome to https://apollo.adc.uk.com the certificate shows fine and shows a SHA256 signed certificate. In Firefox (36.0) it shows a grey warning triangle and the console shows "This site makes use of a SHA-1 Certificate; it's recommended you use certificates with signature algorithms that use hash functions stronger than SHA-1." and I cannot use firefox to show the certificate details. In Firefox Developer Edition (38.0a2 (2015-03-01)) it shows an Error Page with Error code: ssl_error_no_cypher_overlap We have been in contact with both our hosting company (who configure SSL termination on the LB) and the certificate issuers to ask for support but they report everything is OK as expected and they suspect a Firefox bug.

All Replies (3)

philipp
philipp
  • Moderator
more options

hi RichardCocks, this is no bug in the browser - your site only offers weak TLS_RSA_WITH_RC4_128_SHA encryption which should be considered broken. according to this recent proposal browsers have to stop supporting RC4: https://tools.ietf.org/html/rfc7465

starting with firefox 38, the browser will show the error message you've referenced on affected sites...

James
James
  • Top 25 Contributor
  • Moderator
more options

https://www.ssllabs.com/ssltest/analyze.html?d=apollo.adc.uk.com&hideResults=on

https://blog.mozilla.org/security/2014/09/23/phasing-out-certificates-with-sha-1-based-signature-algorithms/

Modified by James

RichardCocks
RichardCocks Question owner
more options

Thanks, I have passed this info onto the hosting company and we have worked to resolve this issue.