Cyber Risks · Qualys Blog

Disabling SSL renegotiation is a crutch, not a fix | Qualys

Summary: After the SSL/TLS Authentication Gap was discovered, some sites that did not need renegotiation dealt with it by disabling renegotiation in server code, while sites that needed it waited for the TLS working group's protocol fix and for vendor support. Nearly a year after public discovery, Qualys reports some servers remain vulnerable, some refuse to support renegotiation, and some support the new secure renegotiation standard, with Debian cited as refusing to fix the problem.

What you should know: Servers that disabled renegotiation send no signal of their security status during the SSL handshake, so browsers like Opera cannot tell the insecure ones from the safe ones and cannot act without inconveniencing users - and SSL Labs' test is indicative but not conclusive, with no way to test for server-initiated renegotiation.

Read the original at Qualys Blog ↗

Topics
Vulnerabilities & Patching
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