{"id":"CVE-2020-12692","aliases":["GHSA-rqw2-hhrf-7936","PYSEC-2020-56"],"url":"https://o3.security/vulnerability/CVE-2020-12692","summary":"OpenStack Keystone does not check signature TTL of the EC2 credential auth method","details":"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":"2020-05-07T00:15:10.987Z","modified":"2026-10-24T10:30:44.851865690Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"keystone","fixedVersion":"16.0.0"},{"ecosystem":"PyPI","name":"keystone","fixedVersion":"15.0.1"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2020/05/07/1"},{"type":"ADVISORY","url":"https://bugs.launchpad.net/keystone/+bug/1872737"},{"type":"ADVISORY","url":"https://security.openstack.org/ossa/OSSA-2020-003.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4480-1/"},{"type":"ADVISORY","url":"https://www.openwall.com/lists/oss-security/2020/05/06/4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-12692"},{"type":"PACKAGE","url":"https://github.com/openstack/keystone"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/keystone/PYSEC-2020-56.yaml"},{"type":"WEB","url":"https://opendev.org/openstack/keystone/commit/ab89ea749013e7f2c46260f68504f5687763e019"},{"type":"WEB","url":"https://usn.ubuntu.com/4480-1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T10:30:44.851865690Z"}}