Unscored severity · published May 19, 2014
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…
–
CVSS
3.3%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)3.3% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
Mac OS X · Apple
through 10.10.4 · source: NVD
PY
Python · Python
2.7.1; 2.7.1; 2.7.2; 2.7.3; 2.7.4; 2.7.5; +34 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2013-7040
CVE.org
https://www.cve.org/CVERecord?id=CVE-2013-7040
bugs.python.org
http://bugs.python.org/issue14621
lists.apple.com
http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
www.openwall.com
http://www.openwall.com/lists/oss-security/2013/12/09/13
www.openwall.com
http://www.openwall.com/lists/oss-security/2013/12/09/3
www.securityfocus.com
http://www.securityfocus.com/bid/64194
Vendor Advisory
https://support.apple.com/kb/HT205031
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