oss-sec mailing list archives
Re: [CVE Requests] rsync and librsync collisions
From: Murray McAllister <mmcallis () redhat com>
Date: Tue, 09 Sep 2014 13:46:30 +1000
Good morning, The below still require a CVE or two (unless MITRE disagrees). Cheers, -- Murray McAllister / Red Hat Product Security On 08/05/2014 04:03 PM, Michael Samuel wrote:
Hi, I think there should be CVEs assigned for this: rsync: MD5 collision DoS attack or limited file corruption librsync: MD4 collision file corruption Note: librsync is not the same code, protocol or maintainer as rsync. The librsync attack is far easier to perform, since there's no whole-file checksum and it will simply copy the first instance of a collision into any place where the second collision is. The rdiff utility that ships with librsync truncates hashes to 8 bytes, allowing a very fast and efficient birthday attack - so even if MD4 was replaced attacks would still be possible while the hash is truncted. This also affects duplicity - they both use RS_DEFAULT_STRONG_LEN - so the _librsyncmodule that ships with duplicity will need recompiling after the fix ships. Previous posting for context: http://www.openwall.com/lists/oss-security/2014/07/28/1 Regards, Michael
Current thread:
- [CVE Requests] rsync and librsync collisions Michael Samuel (Aug 04)
- Re: [CVE Requests] rsync and librsync collisions Loganaden Velvindron (Aug 04)
- Re: [CVE Requests] rsync and librsync collisions Michael Samuel (Aug 04)
- Re: [CVE Requests] rsync and librsync collisions Murray McAllister (Sep 08)
- Re: [CVE Requests] rsync and librsync collisions Loganaden Velvindron (Sep 08)
- Re: [CVE Requests] rsync and librsync collisions Michael Samuel (Sep 08)
- Re: [CVE Requests] rsync and librsync collisions cve-assign (Sep 12)
- Re: Re: [CVE Requests] rsync and librsync collisions Michael Samuel (Sep 15)
- Re: Re: [CVE Requests] rsync and librsync collisions Loganaden Velvindron (Sep 15)
- Re: Re: [CVE Requests] rsync and librsync collisions Michael Samuel (Sep 17)
- Re: [CVE Requests] rsync and librsync collisions Loganaden Velvindron (Sep 08)
- Re: [CVE Requests] rsync and librsync collisions Loganaden Velvindron (Aug 04)