Date: Mon, 9 Dec 2013 18:41:26 -0500 (EST) From: cve-assign@...re.org To: ncoghlan@...hat.com Cc: cve-assign@...re.org, oss-security@...ts.openwall.com Subject: Re: CPython hash secret can be recoved remotely -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > This is a followup to CVE-2012-1150 (hash table collision CPU usage DOS > in CPython) > > http://bugs.python.org/issue14621 points out that the hash secret in > CPython can be recovered remotely, so while the original fix addressed > the "blind DOS" problem (of being able to DOS any Python based service > with a single prepared payload), it didn't completely eliminate the > potential for remote DOS attacks based on hash collisions. > (http://bugs.python.org/issue14621#msg173455 has the details) > > Python 3.4+ will use SipHash by default > (http://www.python.org/dev/peps/pep-0456), which should resolve the > vulnerability completely. Use CVE-2013-7040. - -- CVE assignment team, MITRE CVE Numbering Authority M/S M300 202 Burlington Road, Bedford, MA 01730 USA [ PGP key available through http://cve.mitre.org/cve/request_id.html ] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (SunOS) iQEcBAEBAgAGBQJSplDSAAoJEKllVAevmvmsnusH+wZ4KrZq+VgroTsISAbCqcCH 2KVHnCwsVsbfpdFP8J4TLrRKfueFR53lqgGAi5TbMV9LbT7PYmp3PhVnepjG0h9c 1hbcBNnOcex6Nv/t0gEzOpoW7mMAJ5NkkrLa5zQdqpAox5Oa0G5WJWCgUIrCXhsd xaAJtXC72rWH2iDqvZB8gxVnMAjhbcM+QB5RYHymBh647yTWEm/wY2tuSWGZmmM2 68cof3jY+L0f/UbhpVGKrRKFPVnfqD2TQTwJCYkC0bsAgYf/MVLi7Tw7K0ihi4x0 w5Epxc5dOiN/im1JJq/bnQZmt+JXbenQdKYhnyw1PlHQwG/yJj/8Pboqpu53SGY= =F0rN -----END PGP SIGNATURE-----
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