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CVE-2021-38155

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Date: August 6, 2021

OpenStack Keystone 10.x through 16.x before 16.0.2, 17.x before 17.0.1, 18.x before 18.0.1, and 19.x before 19.0.1 allows information disclosure during account locking (related to PCI DSS features). By guessing the name of an account and failing to authenticate multiple times, any unauthenticated actor could both confirm the account exists and obtain that account's corresponding UUID, which might be leveraged for other unrelated attacks. All deployments enabling security_compliance.lockout_failure_attempts are affected.

Language: Python

Severity Score

Related Resources (8)

https://people.canonical.com/~ubuntu-security/cve/CVE-2021-38155
https://nvd.nist.gov/vuln/detail/CVE-2021-38155
https://lists.debian.org/debian-lts-announce/2024/01/msg00007.html
http://www.openwall.com/lists/oss-security/2021/08/10/5
https://security.openstack.org/ossa/OSSA-2021-003.html
https://launchpad.net/bugs/1688137
https://security-tracker.debian.org/tracker/CVE-2021-38155
https://www.mend.io/vulnerability-database/CVE-2021-38155

Severity Score

Weakness Type (CWE)

Improper Restriction of Excessive Authentication Attempts

CWE-307

Top Fix

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CVSS v3.1

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

CVSS v2

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

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