Date: Mon, 23 Mar 2015 11:38:54 +0100 From: Marcus Meissner <meissner@...e.de> To: oss-security@...ts.openwall.com Subject: Re: CVE for Kali Linux On Sun, Mar 22, 2015 at 11:34:28PM +0300, Alexander Cherepanov wrote: > On 2015-03-22 20:23, Solar Designer wrote: > >https does offer a security aspect that signatures don't: it hides from > >some observers which exact software is being downloaded (and maybe that > >it's a software download at all). It doesn't do that perfectly because > >the target address and transfer timings and sizes may be revealing, but > >I do acknowledge there's some subtle improvement over http here. I just > >think this is far less important than ensuring authenticity of the > >software. So let's demand signatures and signature verification first, > >and let's not be distracted by http vs. https. > > There are some attacks even if you verify signatures, e.g. serving > old, known-vulnerable versions. HTTPS can help here (until > signatures start to be widely accompanied by expiring timestamps or > something). SUSE has added an expiry tag in the YUM metadata for such cases. Ciao, Marcus
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