GHSA-chgw-36xv-47cw CVE-2020-12689 PYSEC-2020-53
OpenStack Keystone EC2 and/or credential endpoints are not protected from a scoped context
- Severity
- 0.0 / 10
- High · CVSS 4.0
- Exploit chance (EPSS)
- 1.56%
- Chance of exploitation in the next 30 days. Higher than 75.26% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-269 Improper Privilege Management
- Fix
15.0.1- Upgrade keystone to this version or later
Description
An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any user authenticated within a limited scope (trust/oauth/application credential) can create an EC2 credential with an escalated permission, such as obtaining admin while the user is on a limited viewer role. This potentially allows a malicious user to act as the admin on a project another user has the admin role on, which can effectively grant that user global admin privileges.
Affected versions
PyPI
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
keystone PyPI → 15.0.1
- pip
pip install --upgrade "keystone>=15.0.1"- poetry
poetry add "keystone>=15.0.1"- uv
uv add "keystone>=15.0.1"
Severity breakdown
CVSS 4.0 0.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- Low
- User interaction
- None
- Confidentiality (vulnerable system)
- High
- Integrity (vulnerable system)
- High
- Availability (vulnerable system)
- High
- Confidentiality (subsequent systems)
- None
- Integrity (subsequent systems)
- None
- Availability (subsequent systems)
- None
CVSS 3.1 8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Weakness
CWE-269: Improper Privilege Management
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
How to prevent it
- Architecture and Design, Operation: Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Architecture and Design: Follow the principle of least privilege when assigning access rights to entities in a software system.
- Architecture and Design: Consider following the principle of separation of privilege. Require multiple conditions to be met before permitting access to a system resource.
References
Advisories
Packages
Other links
- github.com/openstack/keystone/commit/37e9907a176dad6843819b1bec4946c3aecc4548
- bugs.launchpad.net/keystone/+bug/1872735
- github.com/pypa/advisory-database/tree/main/vulns/keystone/PYSEC-2020-53.yaml
- lists.apache.org/thread.html/re4ffc55cd2f1b55a26e07c83b3c22c3fe4bae6054d000a57fb48d8c…
- security.openstack.org/ossa/OSSA-2020-004.html
- usn.ubuntu.com/4480-1
- openwall.com/lists/oss-security/2020/05/06/5
- openwall.com/lists/oss-security/2020/05/07/2
- usn.ubuntu.com/4480-1
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-whqr-fgm5-x77q OpenStack Keystone's federated token rescoping mechanism doesn't propagate the original token's expiry to the newly issued token | High | Also affects keystone |
| GHSA-q623-f4j4-p4xj OpenStack Keystone has an Incorrect Authorization issue | High | Also affects keystone |
| GHSA-2r23-2g6v-2m5f OpenStack Keystone has an Authorization Bypass | High | Also affects keystone |
| GHSA-8f8m-wrvr-wcvf OpenStack Keystone doesn't verify that the user supplied in the authentication request matches the owner of the application credential | High | Also affects keystone |
| GHSA-hhq2-3832-xxcv OpenStack Keystone has an Incorrect Authorization Issue | High | Also affects keystone |
| GHSA-pfx2-9x9m-7ghx OpenStack Keystone: LDAP identity backend does not convert enabled attribute to boolean | High | Also affects keystone |
| GHSA-4phw-6824-6cfp OpenStack Keystone: Restricted application credentials can create EC2 credentials | Medium | Also affects keystone |
| GHSA-hcqg-5g63-7j9h OpenStack Keystone allows /v3/ec2tokens or /v3/s3tokens request with valid AWS Signature to provide Keystone authorization. | High | Also affects keystone |
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