Is it possible to bypass SSL_ERROR_NO_CYPHER_OVERLAP?

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jez9999
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Is it possible to bypass SSL_ERROR_NO_CYPHER_OVERLAP?

Unread post by jez9999 » 2024-12-15, 16:37

I'm trying to access a website that is obviously really old and using an old certificate, and I'm getting the error SSL_ERROR_NO_CYPHER_OVERLAP. I have no ability to change the server or get them to upgrade anything, I just want to download a document from their website. Is there any way I can work around this and just get the browser to download it anyway?

Failing that, does anyone have a suggestion as to an old browser I might be able to download on Windows 10 that does support TLS1 or whatever?

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Moonchild
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Re: Is it possible to bypass SSL_ERROR_NO_CYPHER_OVERLAP?

Unread post by Moonchild » 2024-12-15, 16:51

"No cypher overlap" basically means that the encryption cipher suite on the server and the one in the browser cannot agree on a cipher they both support.
If the server is very old, it is likely they are using old stream ciphers (like RC4 or 3DES-112) or specific RSA ones, that are disabled in Pale Moon by default.
In Pale Moon Commander, you can find these ciphers under security -> Ciphers 2 -> Deprecated/weak/broken ciphers
If you don't have that extension installed, look in about:config for security.ssl3.* preferences (3DES is there listed as "des_ede3" as a more verbose descriptor)
If the protocol is an issue, you can lower it to SSL3 by setting security.tls.version.min to 0 (by default we still support TLS 1.0)
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Re: Is it possible to bypass SSL_ERROR_NO_CYPHER_OVERLAP?

Unread post by jez9999 » 2024-12-15, 16:56

None of that seems to fix the error. Is there a way I can find out precisely what the problem is?

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Re: Is it possible to bypass SSL_ERROR_NO_CYPHER_OVERLAP?

Unread post by Moonchild » 2024-12-15, 17:03

What is the server? or is it not publicly accessible?
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Re: Is it possible to bypass SSL_ERROR_NO_CYPHER_OVERLAP?

Unread post by jez9999 » 2024-12-15, 17:36

OK never mind. I just fixed it by changing https to http and it served it without encryption.