CVE-2024-27317: pulsar Path Traversal — Fix

Description

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.

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CVSS v3.1 Score

8.4

HIGH

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

Weakness Type (CWE)

CWE-22 Path Traversal

Affected Products

Vendor	Product	Versions
apache	pulsar	2.4.0 — 2.10.6
apache	pulsar	2.11.0 — 2.11.4
apache	pulsar	3.0.0 — 3.0.3
apache	pulsar	3.1.0 — 3.1.3
apache	pulsar	All

References

Advisories & Patches

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

Other References

http://www.openwall.com/lists/oss-security/2024/03/12/10 http://www.openwall.com/lists/oss-security/2024/03/12/10

Frequently Asked Questions

What is CVE-2024-27317? +

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. It has a CVSS v3.1 base score of 8.4 (HIGH).

How severe is CVE-2024-27317? +

CVE-2024-27317 has a CVSS v3.1 score of 8.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-27317? +

CVE-2024-27317 affects products from apache, specifically: pulsar. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-27317? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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