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CVE-2024-27894— Apache Pulsar: Pulsar Functions Worker Allows Unauthorized File Access and Unauthorized HTTP/HTTPS Proxying

Quick assessment

Affected
Apache Software Foundation Apache Pulsar
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 存在安全漏洞。攻击者利用该漏洞可以对 Pulsar Functions Worker 进程有权读取的任何文件进行未经授权的访问。

CVSS 8.5 · High EPSS 1.90% · P79
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I. Basic Information for CVE-2024-27894

Vulnerability Information
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Vulnerability Title
Apache Pulsar: Pulsar Functions Worker Allows Unauthorized File Access and Unauthorized HTTP/HTTPS Proxying
Source: CVE Program / CVE List V5
Vulnerability Description
The Pulsar Functions Worker includes a capability that permits authenticated users to create functions where the function's implementation is referenced by a URL. The supported URL schemes include "file", "http", and "https". When a function is created using this method, the Functions Worker will retrieve the implementation from the URL provided by the user. However, this feature introduces a vulnerability that can be exploited by an attacker to gain unauthorized access to any file that the Pulsar Functions Worker process has permissions to read. This includes reading the process environment which potentially includes sensitive information, such as secrets. Furthermore, an attacker could leverage this vulnerability to use the Pulsar Functions Worker as a proxy to access the content of remote HTTP and HTTPS endpoint URLs. This could also be used to carry out denial of service attacks. This vulnerability also applies to the Pulsar Broker when it is configured with "functionsWorkerEnabled=true". This issue affects Apache Pulsar versions from 2.4.0 to 2.10.5, from 2.11.0 to 2.11.3, from 3.0.0 to 3.0.2, from 3.1.0 to 3.1.2, and 3.2.0. 2.10 Pulsar Function Worker users should upgrade to at least 2.10.6. 2.11 Pulsar Function Worker users should upgrade to at least 2.11.4. 3.0 Pulsar Function Worker users should upgrade to at least 3.0.3. 3.1 Pulsar Function Worker users should upgrade to at least 3.1.3. 3.2 Pulsar Function Worker users should upgrade to at least 3.2.1. Users operating versions prior to those listed above should upgrade to the aforementioned patched versions or newer versions. The updated versions of Pulsar Functions Worker will, by default, impose restrictions on the creation of functions using URLs. For users who rely on this functionality, the Function Worker configuration provides two configuration keys: "additionalEnabledConnectorUrlPatterns" and "additionalEnabledFunctionsUrlPatterns". These keys allow users to specify a set of URL patterns that are permitted, enabling the creation of functions using URLs that match the defined patterns. This approach ensures that the feature remains available to those who require it, while limiting the potential for unauthorized access and exploitation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Pulsar 安全漏洞
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 存在安全漏洞。攻击者利用该漏洞可以对 Pulsar Functions Worker 进程有权读取的任何文件进行未经授权的访问。
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 2.4.0 ~ 2.10.6 -

II. Public POCs for CVE-2024-27894

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III. Intelligence Information for CVE-2024-27894

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Mailing List Discussions for CVE-2024-27894 (2)

Other References for CVE-2024-27894 (1)

Same Patch Batch · Apache Software Foundation · 2024-03-12 · 6 CVEs total

CVE-2024-27135 8.5 HIGH Apache Pulsar: Improper Input Validation in Pulsar Function Worker allows Remote Code Exec
CVE-2024-27317 8.4 HIGH Apache Pulsar: Pulsar Functions Worker's Archive Extraction Vulnerability Allows Unauthori
CVE-2022-34321 8.2 HIGH Apache Pulsar: Improper Authentication for Pulsar Proxy Statistics Endpoint
CVE-2024-28098 6.4 MEDIUM Apache Pulsar: Improper Authorization For Topic-Level Policy Management
CVE-2023-41313 Apache Doris: Timing Attack weakness

IV. Related Vulnerabilities

Same product: Apache Pulsar
Same vendor: Apache Software Foundation
Same weakness: CWE-20

V. Comments for CVE-2024-27894

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