NodeBB up to 2.8.6 Export Code path traversal

Summaryinfo

A vulnerability has been found in NodeBB up to 2.8.6 and classified as critical. Impacted is an unknown function of the component Export Code Handler. This manipulation causes path traversal. This vulnerability appears as CVE-2023-26045. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in NodeBB up to 2.8.6 and classified as critical. Affected by this vulnerability is an unknown part of the component Export Code Handler. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

NodeBB is Node.js based forum software. Starting in version 2.5.0 and prior to version 2.8.7, due to the use of the object destructuring assignment syntax in the user export code path, combined with a path traversal vulnerability, a specially crafted payload could invoke the user export logic to arbitrarily execute javascript files on the local disk. This issue is patched in version 2.8.7. As a workaround, site maintainers can cherry pick the fix into their codebase to patch the exploit.

The weakness was presented 07/25/2023 as GHSA-vh2g-6c4x-5hmp. The advisory is shared at github.com. This vulnerability is known as CVE-2023-26045 since 02/17/2023. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 2.8.7 eliminates this vulnerability. Applying the patch ec58700f6dff8e5b4af1544f6205ec362b593092 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• NodeBB

Version

• 2.8.0
• 2.8.1
• 2.8.2
• 2.8.3
• 2.8.4
• 2.8.5
• 2.8.6

License

• open-source

Website

• Product: https://github.com/NodeBB/NodeBB/

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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