Home/CVE/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
CVE

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

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.

MEDIUM · CVSS 5.4 EPSS 0.0014
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-294Authentication Bypass by Capture-replay
CWE-347Improper Verification of Cryptographic Signature
▤

Affected Products & Versions

3
openstack keystone< 15.0.1
openstack keystoneall versions
canonical ubuntu linuxall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI keystone MODERATE fixed in 16.0.0
▣

Scoring & Timeline

5.4
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 May 2020 · 12:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
⚑

Vendor Advisories

4
usnUSN-4480-1
rhsaRHSA-2020:3105Important
rhsaRHSA-2020:3102Important
rhsaRHSA-2020:2732Important
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2020/05/07/1Mailing ListThird Party Advisory
https://bugs.launchpad.net/keystone/+bug/1872737Third Party Advisory
https://security.openstack.org/ossa/OSSA-2020-003.htmlVendor Advisory
https://usn.ubuntu.com/4480-1/Third Party Advisory
https://www.openwall.com/lists/oss-security/2020/05/06/4Mailing ListThird Party Advisory
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