What’s Vulnerable › Vulnerabilities

CVE-2020-12692

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-07 · updated 2026-06-17
• Weakness: CWE-294

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.

Affected products

• Canonical Ubuntu Linux: 18.04
• OpenStack Keystone: before 15.0.1; 16.0.0 — fixed in 15.0.1

How to fix

Upgrade to a fixed version: OpenStack Keystone 15.0.1. Check the vendor advisory for mitigations.

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
• 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

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