oss-sec mailing list archives
Re: Re: [CVE Requests] rsync and librsync collisions
From: Vitezslav Cizek <civ () blema cz>
Date: Fri, 10 Apr 2015 11:26:53 +0200
Hi Michael, * Dne Thursday 18. September 2014, 04:30:22 [CEST] Michael Samuel napsal:
Ok, for rsync you can download colliding blocks (and a brief description) here: https://github.com/therealmik/rsync-collision I don't get the feeling that this will be fixed upstream, but a simple fix would be to incorporate libdetectcoll from Marc Stevens into rsync, and when a collision attempt is detected to simply send a data block. A longer-term would be to just replace MD5 with a collision-resistant hash function - blake2 is a good fit. The 128-bit output is right on the edge of being strong enough. I submitted a very rough patch which does both, but I haven't had the time to clean the rough edges - the libdetectcoll codebase needs a fair amount of cleaning (printfs etc), and the rsync codebase needs a fair bit of refactor to handle hash output lengths > 16 bytes.
Was there any further progress with the rsync upstream? Are they planning to address this issue or is there no interest? Vita Cizek
Current thread:
- Re: Re: [CVE Requests] rsync and librsync collisions Vitezslav Cizek (Apr 10)
- Re: Re: [CVE Requests] rsync and librsync collisions mancha (Apr 10)
- Re: Re: [CVE Requests] rsync and librsync collisions Michael Samuel (Apr 10)
- Re: Re: [CVE Requests] rsync and librsync collisions mancha (Apr 10)
- Re: Re: [CVE Requests] rsync and librsync collisions Michael Samuel (Apr 10)
- Re: Re: [CVE Requests] rsync and librsync collisions Michael Samuel (Apr 10)
- Re: Re: [CVE Requests] rsync and librsync collisions mancha (Apr 10)
- Re: Re: [CVE Requests] rsync and librsync collisions Kurt Seifried (Apr 10)
- Re: Re: [CVE Requests] rsync and librsync collisions Michael Samuel (Apr 10)
- Re: Re: [CVE Requests] rsync and librsync collisions Kurt Seifried (Apr 10)
- Re: Re: [CVE Requests] rsync and librsync collisions mancha (Apr 10)