CVE-2020-12692Network attack vector

Repeated token issuance via unchecked signature age

Published May 6, 2020 · Updated Aug 4, 2024

Authentication bypass in OpenStack Keystone before 15.0.1 and in 16.0.0 allows remote attackers to mint tokens with captured AWS V4 headers. The EC2 authentication path verifies the signature but fails to reject an X-Amz-Date timestamp older than the configured credential lifetime. Exploitation requires interception of a valid signed request; replay yields fresh OpenStack tokens for that credential's authorized scope.

CVSS severity5.4
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in OpenStack Keystone before 15.0.1 and in 16.0.0 allows remote attackers to mint tokens with captured AWS V4 headers. The EC2 authentication path verifies the signature but fails to reject an X-Amz-Date timestamp older than the configured credential lifetime. Exploitation requires interception of a valid signed request; replay yields fresh OpenStack tokens for that credential's authorized scope.

The record

CVE
CVE-2020-12692
Published
May 6, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-294, CWE-347, T1550.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
CWE-347Improper Verification of Cryptographic Signature
T1550.001Application Access Token

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo