PSF-2018-4

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    PSF-2018-4

    Published: 19 Jun 2018Last Modified: 9 Oct 2025
    Aliases:
    CVE-2018-1061

    Summary: difflib and poplib catastrophic backtracking

    Details: python before versions 2.7.15, 3.4.9, 3.5.6rc1, 3.6.5rc1 and 3.7.0 is vulnerable to catastrophic backtracking in the difflib.IS_LINE_JUNK method. An attacker could use this flaw to cause denial of service.

    References: https://bugs.python.org/issue32981

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -0902a2d6b2d1d9dbde36aeaaccf1788ceaa97143

    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-2018-4 | CVE-DB