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[email protected]CVE-2021-22160

HistoryMay 26, 2021 - 1:15 p.m.

CVE-2021-22160

2021-05-2613:15:07

CWE-347

[email protected]

web.nvd.nist.gov

cve

apache

pulsar

jwt

signature

validation

bypass

nvd

7.5 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.3 High

AI Score

Confidence

High

0.017 Low

EPSS

Percentile

87.8%

JSON

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).

Affected configurations

Vulners

NVD

Node

apachepulsarRange≤2.7.1

CPENameOperatorVersion
apache:pulsarapache pulsarlt2.7.1

CPE	Name	Operator	Version
apache:pulsar	apache pulsar	lt	2.7.1

CNA Affected

[
  {
    "product": "Apache Pulsar",
    "vendor": "Apache Software Foundation",
    "versions": [
      {
        "lessThan": "2.7.1",
        "status": "affected",
        "version": "Apache Pulsar",
        "versionType": "custom"
      }
    ]
  }
]