Re: MD5 Collisions...




On Mon, 3 Dec 2007, Norberto Meijome wrote:

Hi everyone,

Not sure if you've read http://www.win.tue.nl/hashclash/SoftIntCodeSign/ .

should some kind of advisory be sent to advise people not to rely solely on MD5 checksums? Maybe an update to the man page is due ? :

"
MD5 has not yet (2001-09-03) been broken, but sufficient attacks have
been made that its security is in some doubt. The attacks on MD5 are in
the nature of finding ``collisions'' -- that is, multiple inputs which
hash to the same value; it is still unlikely for an attacker to be able
to determine the exact original input given a hash value.
"

Some measures are already taken:
- FreeBSD ports use not only MD5 but SHA256 additionaly
- Same applied for FreeBSD ISO images

Best Regards,

Janos Mohacsi
Network Engineer, Research Associate, Head of Network Planning and Projects
NIIF/HUNGARNET, HUNGARY
Key 70EF9882: DEC2 C685 1ED4 C95A 145F 4300 6F64 7B00 70EF 9882


_______________________________________________
freebsd-security@xxxxxxxxxxx mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-security
To unsubscribe, send any mail to "freebsd-security-unsubscribe@xxxxxxxxxxx"

Relevant Pages

  • Re: MD5 for passwords
    ... how do attacks vary with the length of hashed string ... The password hash is NOT MD5, just as the old Unix crypt 3 is not des. ... MD5 password hashing system out there? ...
    (sci.crypt)
  • Re: SHA-1 vs. triple-DES for password encryption?
    ... > reason I suggested MD5 is that Craig wanted to save bytes. ... truncated SHA1 hash than an MD5 hash. ... > algorithms were discarded after diff. ... but the best known attacks against a bunch of the AES ...
    (SecProg)
  • Re: MD5 Collisions...
    ... MD5 has not yet been broken, but sufficient attacks have ... MD5 is no longer recommended as a cryptographic message digest algorithm, although it functions very well as a big checksum. ...
    (FreeBSD-Security)
  • MD5 To Be Considered Harmful Someday
    ... I've been doing some analysis on MD5 collision announced by Wang et al. ... Yes, Virginia, there is no such thing as a safe hash ... attacks described in the paper. ... payload, but the payload is encrypted with AES. ...
    (sci.crypt)
  • Re: SHA-1 vs. triple-DES for password encryption?
    ... The risk is too high even ... Yes the attacks on MD5 are purely theoretical and are not ... a single pass of the hash algorithm is all that is needed. ...
    (SecProg)