Apache Pulsar up to 3.2.0 Functions Worker improper authorization

Summaryinfo

A vulnerability was found in Apache Pulsar up to 2.10.5/2.11.3/3.0.2/3.1.2/3.2.0 and classified as critical. The impacted element is an unknown function of the component Functions Worker. Executing a manipulation can lead to improper authorization. This vulnerability is tracked as CVE-2024-27894. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Apache Pulsar up to 2.10.5/2.11.3/3.0.2/3.1.2/3.2.0. This vulnerability affects an unknown code of the component Functions Worker. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed 03/12/2024 by Lari Hotari. The advisory is available at lists.apache.org. This vulnerability was named CVE-2024-27894 since 02/26/2024. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 01/19/2025). This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

Upgrading to version 2.10.6, 2.11.4, 3.0.3, 3.1.3 or 3.2.1 eliminates this vulnerability.

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Productinfo

Vendor

• Apache

Name

• Pulsar

Version

• 2.10.0
• 2.10.1
• 2.10.2
• 2.10.3
• 2.10.4
• 2.10.5
• 2.11.0
• 2.11.1
• 2.11.2
• 2.11.3
• 3.0
• 3.0.0
• 3.0.1
• 3.0.2
• 3.1
• 3.1.0
• 3.1.1
• 3.1.2
• 3.2.0

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

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CPE 2.2info

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