Python 2.7 before 3.4 only uses the last eight bits of the prefix to randomize hash values, which causes it to compute hash values without restricting the ability to trigger hash collisions predictably and makes it easier for context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-1150.
Weaknesses in this category are related to the design and implementation of data confidentiality and integrity. Frequently these deal with the use of encoding techniques, encryption libraries, and hashing algorithms. The weaknesses in this category could lead to a degradation of the quality data if they are not addressed.
| Link | Tags |
|---|---|
| http://www.securityfocus.com/bid/64194 | vdb entry |
| http://www.openwall.com/lists/oss-security/2013/12/09/13 | mailing list |
| http://www.openwall.com/lists/oss-security/2013/12/09/3 | mailing list |
| http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html | vendor advisory |
| http://bugs.python.org/issue14621 | |
| https://support.apple.com/kb/HT205031 | vendor advisory |