Date: Thu, 22 May 2008 08:15:45 +0100 (BST) From: Mark J Cox <mjc@...hat.com> To: oss-security@...ts.openwall.com Subject: Re: Root name server changes -> bind > #3: Second solution, and the better one that is harder to implement I > imagine, is to care a lot less about where it is contacting and care a lot > more about the information it is receiving. Digital signatures, MD5 hashes > (where would it get those from though) or some other form of validation of > the content it receives would help reduce risk significantly. This is what I bet most of the vendors represented here do; for example the Red Hat Network client 1) contacts the server at Red Hat over SSL, 2) verifies that the certificate of the site it's connecting to was issued by a CA hardcoded into the distro, 3) will only install packages without prompting that are digitally signed by a previously-imported public key. If any one of those mechanisms failed I would expect it to generate a CVE (even though the security of the system as a whole isn't broken unless all of them break together). This sort of update mechanism isn't that difficult to implement. So should you give a CVE to an update mechanism that fails to implement a secure update process? absolutely. Mark
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