What is CVE-2023-3040?

CVE-2023-3040 is a vulnerability in the lua-resty-json package that could allow an attacker to launch a Denial of Service attack if the debug function is used with untrusted input data.

What is the severity of CVE-2023-3040?

The severity of CVE-2023-3040 is high, with a severity value of 7.5.

How can an attacker exploit CVE-2023-3040?

An attacker can exploit CVE-2023-3040 by using the debug function of the lua-resty-json package with malicious input data, which can lead to a Denial of Service attack.

Are there any fixes available for CVE-2023-3040?

Yes, Cloudflare has fixed the vulnerability in the lua-resty-json package. It is recommended to update to a version released after May 5, 2023.

Where can I find more information about CVE-2023-3040?

More information about CVE-2023-3040 can be found in the Cloudflare lua-resty-json GitHub repository and the associated security advisories.

Vulnerability/
CVE-2023-3040

high

7.5

CWE

125

14/6/2023

2/1/2025

CVE-2023-3040: Out of Bounds Access Leading to Undefined Behavior

First published: Wed Jun 14 2023(Updated: )

A debug function in the lua-resty-json package, up to commit id 3ef9492bd3a44d9e51301d6adc3cd1789c8f534a (merged in PR #14) contained an out of bounds access bug that could have allowed an attacker to launch a DoS if the function was used to parse untrusted input data. It is important to note that because this debug function was only used in tests and demos, it was not exploitable in a normal environment.

Credit: cna@cloudflare.com

Affected Software	Affected Version	How to fix
Cloudflare Lua-resty-json	<2023-05-05

Remedy

https://github.com/cloudflare/lua-resty-json/pull/14

Remedy

https://github.com/cloudflare/lua-resty-json/security/advisories/GHSA-h8rp-9622-83pg

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Reference Links

Frequently Asked Questions

What is CVE-2023-3040?
CVE-2023-3040 is a vulnerability in the lua-resty-json package that could allow an attacker to launch a Denial of Service attack if the debug function is used with untrusted input data.
What is the severity of CVE-2023-3040?
The severity of CVE-2023-3040 is high, with a severity value of 7.5.
How can an attacker exploit CVE-2023-3040?
An attacker can exploit CVE-2023-3040 by using the debug function of the lua-resty-json package with malicious input data, which can lead to a Denial of Service attack.
Are there any fixes available for CVE-2023-3040?
Yes, Cloudflare has fixed the vulnerability in the lua-resty-json package. It is recommended to update to a version released after May 5, 2023.
Where can I find more information about CVE-2023-3040?
More information about CVE-2023-3040 can be found in the Cloudflare lua-resty-json GitHub repository and the associated security advisories.

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agent/author
agent/title
agent/weakness
agent/last-modified-date
agent/description
agent/first-publish-date
agent/event
agent/tags
vendor/cloudflare
canonical/cloudflare lua-resty-json

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