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Date: Sun, 20 Jan 2013 13:32:33 +0100
From: Salvatore Bonaccorso <>
Subject: CVE request: hs-tls: Basic constraints vulnerability


For hs-tls (TLS/SSL implementation in haskell) it was announced the following

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].


According to the upstream issue it should be fixed with commit [2].


Could a CVE for this issue be assigned?


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