PT-2013-6249 · Python+2 · Python+2

Nick Coghlan · Published 2013-12-18 · Updated 2019-10-25 · CVE-2013-7040

Positive Technologies (AI Summary)

CVSS v2.0

4.3

Medium

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Name of the Vulnerable Software and Affected Versions Python versions prior to 3.4

Description The issue causes Python to compute hash values without properly restricting the ability to trigger hash collisions predictably. This makes it easier for attackers to cause a denial of service via crafted input to an application that maintains a hash table, resulting in CPU consumption.

Recommendations For versions prior to 3.4, consider upgrading to a version that properly randomizes hash values to prevent predictable hash collisions. As a temporary workaround, consider implementing additional checks or restrictions on input to applications that maintain hash tables to minimize the risk of exploitation.

Exploit

Fix

DoS

Weakness Enumeration

CWE-310

Related Identifiers

ALT-PU-2014-2376

ALT-PU-2016-1294

CVE-2013-7040

PSF-2014-2

Affected Products

Alt Linux

Debian

Python

References · 79

• 🔥 https://github.com/ssllabs/openssl-ccs-cve-2014-0224 · Exploit
• 🔥 https://github.com/secretnonempty/CVE-2014-0224 · Exploit
• 🔥 https://github.com/bunseokbot/CVE-2016-5699-poc · Exploit
• https://errata.altlinux.org/ALT-PU-2014-2376 · Vendor Advisory
• https://bdu.fstec.ru/vul/2015-05846 · Security Note
• https://support.apple.com/kb/HT205031 · Vendor Advisory
• https://bdu.fstec.ru/vul/2015-05851 · Security Note
• https://bdu.fstec.ru/vul/2015-07483 · Security Note
• https://bdu.fstec.ru/vul/2015-04313 · Security Note
• https://bdu.fstec.ru/vul/2015-05847 · Security Note
• https://errata.altlinux.org/ALT-PU-2016-1294 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2013-7040 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-1753 · Security Note
• https://bdu.fstec.ru/vul/2015-00125 · Security Note
• https://bdu.fstec.ru/vul/2015-07477 · Security Note