USN-5138-1

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    USN-5138-1

    Published: 10 Nov 2021Last Modified: 27 Apr 2026

    Summary: python-py vulnerability

    Details: The py.path.svnwc component of py (aka python-py) through v1.9.0 contains a regular expression with an ambiguous subpattern that is susceptible to catastrophic backtracing. This could be used by attackers to cause a compute-time denial of service attack by supplying malicious input to the blame functionality.

    References: https://ubuntu.com/security/notices/USN-5138-1, https://ubuntu.com/security/CVE-2020-29651

    Affected packages

    Package

    Name: python-py

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.5.2-1ubuntu0.1

    Affected versions

    1.4.34-2ubuntu1
    1.4.34-3

    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
    USN-5138-1 | CVE-DB