CVE-2013-7040
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…
Does this matter?
Lower severity and a low EPSS score (3.26%). Track it; it rarely justifies an emergency change on its own.
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 2.0
- 4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P
- EPSS
- 3.26% probability · 88th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-310
- Affected
- apple/mac os x · python/python
- Source
- cve@mitre.org
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.