CVE-2020-12691: canonical ubuntu_linux Incorrect Authorization
Vulnerability summary
CVE-2020-12691 is a high (CVSS 8.8) Incorrect Authorization vulnerability in canonical ubuntu_linux. EPSS estimates a 4.92% chance of exploitation in the next 30 days, higher than 92% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 6 · Related 1Timeline
- 06-05-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in OpenStack Keystone before 15.0.1, and 16.0.0. Any authenticated user can create an EC2 credential for themselves for a project that they have a specified role on, and then perform an update to the credential user and project, allowing them to masquerade as another user. 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.
CVSS metrics
6 scores · 4 sources · 3 versions- OSV · PypiEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
4.92%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
0.00 pp
From 4.92% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Canonical1 product
- ubuntu_linuxEOL18.04
Debian1 product
- keystone< 2:17.0.0~rc2-1
Openstack1 product
- keystone< 15.0.1 | 16.0.0
PyPI1 product
- keystone≥ 16.0.0, < 16.0.1 | < 15.0.1
Ubuntu1 product
- keystoneAll versions (No fix recorded) | < 2:13.0.4-0ubuntu1
5 vendors · 5 products
References
21 links- www.openwall.com/lists/oss-security/2020/05/06/5X Refsource MISCWEBREPORTMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2020/05/07/2Mailing ListX Refsource MLISTWEBThird Party Advisory
