PSF-2014-2

    Dashboard / Vulnerabilities / PSF-2014-2

    PSF-2014-2

    Published: 19 May 2014Last Modified: 9 Oct 2025
    Aliases:
    CVE-2013-7040

    Summary: Hash function not randomized properly

    Details: 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.

    References: https://bugs.python.org/issue14621

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -985ecdcfc29adfc36ce2339acf03f819ad414869

    Affected versions

    2.5

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    PSF-2014-2 | CVE-DB