Bug 2269257 (CVE-2024-27317)

Summary: CVE-2024-27317 apache-pulsar: Pulsar Functions Worker's Archive Extraction Vulnerability Allows Unauthorized File Modification
Product: [Other] Security Response Reporter: Marco Benatto <mbenatto>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedCC: aileenc, asoldano, bbaranow, bmaxwell, brian.stansberry, cdewolf, chazlett, cmiranda, darran.lofthouse, dkreling, dosoudil, fjuma, fmariani, gmalinko, ivassile, iweiss, janstey, jpoth, lgao, mosmerov, msochure, mstefank, msvehla, nwallace, pcongius, pdelbell, pjindal, pmackay, rstancel, smaestri, tcunning, tom.jenkinson, yfang
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A path traversal vulnerability was found in Apache Pulsar. Pulsar allows authenticated users to upload functions to be run by the Pulsar Function Workers, these codes are in the format of a ZIP file. When extracting the uploaded ZIP file Pulsar fails to properly validate the file names contained in the uploaded ZIP file. This flaw allows an attacker to create or modify files outside of the intended directory, possibly influencing the system's behavior. Pulsar Broker is also vulnerable to this flaw when configured with "functionsWorkerEnabled=true".
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Bug Blocks: 2269246    

Description Marco Benatto 2024-03-12 20:31:54 UTC 
In Pulsar Functions Worker, authenticated users can upload functions in jar or nar files. These files, essentially zip files, are extracted by the Functions Worker. However, if a malicious file is uploaded, it could exploit a directory traversal vulnerability. This occurs when the filenames in the zip files, which aren't properly validated, contain special elements like "..", altering the directory path. This could allow an attacker to create or modify files outside of the designated extraction directory, potentially influencing system behavior. 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.

https://lists.apache.org/thread/ct9xmvlf7lompc1pxvlsb60qstfsm9po
https://pulsar.apache.org/security/CVE-2024-27317/