UBUNTU-CVE-2021-28861

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    UBUNTU-CVE-2021-28861

    Published: 23 Aug 2022Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-28861

    Summary:

    Details: Python 3.x through 3.10 has an open redirection vulnerability in lib/http/server.py due to no protection against multiple (/) at the beginning of URI path which may leads to information disclosure. NOTE: this is disputed by a third party because the http.server.html documentation page states "Warning: http.server is not recommended for production. It only implements basic security checks."

    References: https://ubuntu.com/security/CVE-2021-28861, https://github.com/python/cpython/pull/93879, https://github.com/python/cpython/pull/24848, https://ubuntu.com/security/notices/USN-5629-1, https://ubuntu.com/security/notices/USN-5888-1, https://python-security.readthedocs.io/vuln/http-server-redirection.html, https://www.cve.org/CVERecord?id=CVE-2021-28861

    Affected packages

    Package

    Name: python3.5

    Purl: pkg:deb/ubuntu/[email protected]~16.04.13+esm5?arch=source&distro=esm-infra/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.5.2-2ubuntu0~16.04.13+esm5

    Affected versions

    3.5.0-3
    3.5.0-3ubuntu1
    3.5.1~rc1-2ubuntu1
    3.5.1-1
    3.5.1-2
    3.5.1-3
    3.5.1-5
    3.5.1-6ubuntu1
    3.5.1-6ubuntu2
    3.5.1-9ubuntu1
    3.5.1-10
    3.5.2-2~16.01
    3.5.2-2~16.04
    3.5.2-2ubuntu0~16.04.1
    3.5.2-2ubuntu0~16.04.2
    3.5.2-2ubuntu0~16.04.3
    3.5.2-2ubuntu0~16.04.4
    3.5.2-2ubuntu0~16.04.5
    3.5.2-2ubuntu0~16.04.8
    3.5.2-2ubuntu0~16.04.9
    3.5.2-2ubuntu0~16.04.10
    3.5.2-2ubuntu0~16.04.11
    3.5.2-2ubuntu0~16.04.12
    3.5.2-2ubuntu0~16.04.13
    3.5.2-2ubuntu0~16.04.13+esm1
    3.5.2-2ubuntu0~16.04.13+esm2
    3.5.2-2ubuntu0~16.04.13+esm3

    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