Vulnerability in OpenStack Keystone
CVE-2020-12692
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (52.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- OpenStack Keystone — versions 16.0.0
- Canonical Ubuntu Linux — versions 18.04
Weakness classification (CWE)
References
- security.openstack.org/ossa/OSSA-2020-003.html (Vendor Advisory)
- bugs.launchpad.net/keystone/+bug/1872737 (Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/05/06/4 (Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2020/05/07/1 (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4480-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-12692?
- CVE-2020-12692 is a medium-severity vulnerability in OpenStack Keystone, classified under Authentication Bypass by Capture-replay. CVSS score: 5.4/10. Published 2020-05-07.
- How severe is CVE-2020-12692?
- Medium severity. CVSS v3 base score is 5.4 out of 10.