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Improper Verification of Cryptographic Signature in Apache Pulsar in TensorFlow

Critical severity GitHub Reviewed Published Jun 1, 2021 to the GitHub Advisory Database • Updated Jan 29, 2023

Package

maven org.apache.pulsar:pulsar (Maven)

Affected versions

< 2.7.2

Patched versions

2.7.2

Description

If Apache Pulsar is configured to authenticate clients using tokens based on JSON Web Tokens (JWT), the signature of the token is not validated if the algorithm of the presented token is set to "none". This allows an attacker to connect to Pulsar instances as any user (incl. admins).

References

Published by the National Vulnerability Database May 26, 2021
Reviewed Jun 1, 2021
Published to the GitHub Advisory Database Jun 1, 2021
Last updated Jan 29, 2023

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

3.481%
(91st percentile)

Weaknesses

CVE ID

CVE-2021-22160

GHSA ID

GHSA-3cv4-xxv7-934q

Source code

No known source code
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