PYSEC-2020-56

    Dashboard / Vulnerabilities / PYSEC-2020-56

    PYSEC-2020-56

    Published: 7 May 2020Last Modified: 10 Jun 2026

    Summary:

    Details: An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. The EC2 API doesn't have a signature TTL check for AWS Signature V4. An attacker can sniff the Authorization header, and then use it to reissue an OpenStack token an unlimited number of times.

    References: https://www.openwall.com/lists/oss-security/2020/05/06/4, https://bugs.launchpad.net/keystone/+bug/1872737, http://www.openwall.com/lists/oss-security/2020/05/07/1, https://security.openstack.org/ossa/OSSA-2020-003.html, https://usn.ubuntu.com/4480-1/, https://github.com/advisories/GHSA-rqw2-hhrf-7936

    Affected packages

    Package

    Name: keystone

    Purl: pkg:pypi/keystone

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -15.0.1

    Affected versions

    12.0.2
    12.0.3

    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
    PYSEC-2020-56 | CVE-DB