Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apple | Mac Os X | <= 10.10.4 |
| Python | Python | 2.7.1 |
Related Weaknesses (CWE)
References
- http://bugs.python.org/issue14621
- http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
- http://www.openwall.com/lists/oss-security/2013/12/09/13
- http://www.openwall.com/lists/oss-security/2013/12/09/3
- http://www.securityfocus.com/bid/64194
- https://support.apple.com/kb/HT205031Vendor Advisory
- http://bugs.python.org/issue14621
- http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
- http://www.openwall.com/lists/oss-security/2013/12/09/13
- http://www.openwall.com/lists/oss-security/2013/12/09/3
- http://www.securityfocus.com/bid/64194
- https://support.apple.com/kb/HT205031Vendor Advisory
FAQ
What is CVE-2013-7040?
CVE-2013-7040 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 predictabl...
How severe is CVE-2013-7040?
CVE-2013-7040 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2013-7040?
Check the references section above for vendor advisories and patch information. Affected products include: Apple Mac Os X, Python Python.