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CVE-2021-22160— Authentication with JWT allows use of “none”-algorithm

Quick assessment

Affected
Apache Software Foundation Apache Pulsar
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Pulsar是美国阿帕奇（Apache）基金会的一个用于云环境种，集消息、存储、轻量化函数式计算为一体的分布式消息流平台。该软件支持多租户、持久化存储、多机房跨区域数据复制，具有强一致性、高吞吐以及低延时的高可扩展流数据存储特性。 Apache Pulsar存在数据伪造问题漏洞，该漏洞源于在处理基于JSON Web令牌(JWT)的身份验证请求时出现的错误，允许远程攻击者绕过身份验证过程。以下产品和版本受到影响:Apache Pulsar:1.14, 1.15, 1.15.1, 1.15.2,

AI Predicted 9.8 Difficulty: Easy EPSS 52.93% · P99
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I. Basic Information for CVE-2021-22160

Vulnerability Information
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Vulnerability Title
Authentication with JWT allows use of “none”-algorithm
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Pulsar 数据伪造问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Pulsar是美国阿帕奇（Apache）基金会的一个用于云环境种，集消息、存储、轻量化函数式计算为一体的分布式消息流平台。该软件支持多租户、持久化存储、多机房跨区域数据复制，具有强一致性、高吞吐以及低延时的高可扩展流数据存储特性。 Apache Pulsar存在数据伪造问题漏洞，该漏洞源于在处理基于JSON Web令牌(JWT)的身份验证请求时出现的错误，允许远程攻击者绕过身份验证过程。以下产品和版本受到影响:Apache Pulsar:1.14, 1.15, 1.15.1, 1.15.2,
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Pulsar Apache Pulsar ~ 2.7.1 -

II. Public POCs for CVE-2021-22160

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III. Intelligence Information for CVE-2021-22160

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Mailing List Discussions for CVE-2021-22160 (8)

IV. Related Vulnerabilities

Same product: Apache Pulsar
Same vendor: Apache Software Foundation

V. Comments for CVE-2021-22160

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