A flaw was found in openstack-keystone. Only the first 72 characters of an application secret are verified allowing attackers bypass some password complexity which administrators may be counting on. The highest threat from this vulnerability is to data confidentiality and integrity.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A flaw was found in openstack-keystone. Only the first 72 characters of an application secret are verified
    allowing attackers bypass some password complexity which administrators may be counting on. The highest
    threat from this vulnerability is to data confidentiality and integrity. (CVE-2021-3563)

The remote Ubuntu 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7926-1 advisory.

    Kay discovered that OpenStack Keystone incorrectly handled the ec2tokens and s3tokens APIs. A remote     attacker could possibly use this issue to obtain unauthorized access and escalate privileges.
    (CVE-2025-65073)

    It was discovered that OpenStack Keystone only validated the first 72 bytes of an application secret. An     attacker could possibly use this issue to bypass password complexity. (CVE-2021-3563)

    It was discovered that OpenStack Keystone had a time lag before a token should be revoked by the security     policy. A remote administrator could use this issue to maintain access for longer than expected.
    (CVE-2022-2447)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2025:0054 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2021-3563:
    A flaw was found in openstack-keystone. Only the first 72 characters of an application secret are verified     allowing attackers bypass some password complexity which administrators may be counting on. The highest     threat from this vulnerability is to data confidentiality and integrity.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A flaw was found in openstack-keystone. Only the first 72 characters of an application secret are verified     allowing attackers bypass some password complexity which administrators may be counting on. The highest     threat from this vulnerability is to data confidentiality and integrity. (CVE-2021-3563)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3714 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-3714-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Bastien Roucaris     January 21, 2024                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : keystone     Version        : 2:14.2.0-0+deb10u2     CVE ID         : CVE-2021-3563 CVE-2021-38155     Debian Bug     : 992070 989998

    Brief introduction

    CVE-2021-3563

        A flaw was found in openstack-keystone. Only the first 72 characters         of an application secret are verified allowing attackers bypass some         password complexity which administrators may be counting on.
        The highest threat from this vulnerability is to data confidentiality         and integrity.

    CVE-2021-38155

        Keystone allowed information disclosure during account locking         (related to PCI DSS features). By guessing the name of an account         and failing to authenticate multiple times, any unauthenticated actor         could both confirm the account exists and obtain that account's         corresponding UUID, which might be leveraged for other unrelated         attacks. All deployments enabling         security_compliance.lockout_failure_attempts are affected.

    For Debian 10 buster, these problems have been fixed in version     2:14.2.0-0+deb10u2.

    We recommend that you upgrade your keystone packages.

    For the detailed security status of keystone please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/keystone

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
477677	SCA: security update for keystone (GHSA-cc99-whm5-mmq3)	Tenable Cloud Security	SCA Checks	Local	high
477677	SCA: security update for keystone (GHSA-cc99-whm5-mmq3)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
278510	Ubuntu 22.04 LTS : OpenStack Keystone vulnerabilities (USN-7926-1)	Nessus	Ubuntu Local Security Checks	Local	high
238720	TencentOS Server 4: openstack-keystone (TSSA-2025:0054)	Nessus	Tencent Local Security Checks	Local	high
223942	Linux Distros Unpatched Vulnerability : CVE-2021-3563	Nessus	Misc.	Local	high
189282	Debian dla-3714 : keystone - security update	Nessus	Debian Local Security Checks	Local	high

Detections

Analytics

CVE-2021-3563

high

Tenable Plugins

high

high

high

high

high

high