[Haskell-cafe] [ANN] tls-extra 0.6.1 - security update, please upgrade.

Vincent Hanquez tab at snarc.org
Sun Jan 20 06:50:16 CET 2013

Hi cafe,

this is a security advisory for tls-extra < 0.6.1 which are all vulnerable to bad
certificate validation.

Some part of the certificate validation procedure were missing (relying on the
work-in-progress x509 v3 extensions), and because of this anyone with a correct
end-entity certificate can issue certificate for any arbitrary domain, i.e.
acting as a CA.

This problem has been fixed in tls-extra 0.6.1, and I advise everyone to upgrade as
soon as possible.

Despite a very serious flaw in the certificate validation, I'm happy that the
code is seeing some audits, and would want to thanks Ertugrul Söylemez for the
findings [1].

[1] https://github.com/vincenthz/hs-tls/issues/29


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