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CVE-2020-12692

Good to know:

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Date: May 6, 2020

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.

Language: Python

Severity Score

Related Resources (12)

https://bugs.launchpad.net/keystone/+bug/1872737
https://security.openstack.org/ossa/OSSA-2020-003.html
https://github.com/openstack/keystone
https://security-tracker.debian.org/tracker/CVE-2020-12692
https://usn.ubuntu.com/4480-1/
https://github.com/pypa/advisory-database/tree/main/vulns/keystone/PYSEC-2020-56.yaml
https://opendev.org/openstack/keystone/commit/ab89ea749013e7f2c46260f68504f5687763e019
https://www.openwall.com/lists/oss-security/2020/05/06/4
https://usn.ubuntu.com/4480-1
https://nvd.nist.gov/vuln/detail/CVE-2020-12692
http://www.openwall.com/lists/oss-security/2020/05/07/1
https://www.mend.io/vulnerability-database/CVE-2020-12692

Severity Score

Weakness Type (CWE)

Improper Verification of Cryptographic Signature

CWE-347

Missing Encryption of Sensitive Data

CWE-311

Authentication Bypass by Capture-replay

CWE-294

Top Fix

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Upgrade Version

Upgrade to version keystone - 16.0.0;keystone - 15.0.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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