{"cve":"CVE-2020-12692","nvd":{"published":"2020-05-07T00:15:10.987","modified":"2026-06-17T02:52:08.747","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":5.4},"cwes":["CWE-294","CWE-347"],"references":["http://www.openwall.com/lists/oss-security/2020/05/07/1","https://bugs.launchpad.net/keystone/+bug/1872737","https://security.openstack.org/ossa/OSSA-2020-003.html","https://usn.ubuntu.com/4480-1/","https://www.openwall.com/lists/oss-security/2020/05/06/4"],"products":["canonical:ubuntu_linux","openstack:keystone"],"source":"nvd","synced_at":"2026-10-19T21:04:18.695612450+00:00"},"epss":{"cve":"CVE-2020-12692","score":0.00705,"percentile":0.53361,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-rqw2-hhrf-7936","url":"https://osv.dev/vulnerability/GHSA-rqw2-hhrf-7936","summary":"OpenStack Keystone does not check signature TTL of the EC2 credential auth method","modified":"2024-09-27T21:33:08.561033Z","packages":[{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":[">=16.0.0.0rc1 <16.0.0"],"fixed":["16.0.0"]},{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":["<15.0.1"],"fixed":["15.0.1"]}]},{"id":"PYSEC-2020-56","url":"https://osv.dev/vulnerability/PYSEC-2020-56","summary":"","modified":"2026-06-10T17:01:03.770592376Z","packages":[{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":["<15.0.1"],"fixed":["15.0.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}