CVE-2024-4067

Description

The NPM package `micromatch` prior to 4.0.8 is vulnerable to Regular Expression Denial of Service (ReDoS). The vulnerability occurs in `micromatch.braces()` in `index.js` because the pattern `.*` will greedily match anything. By passing a malicious payload, the pattern matching will keep backtracking to the input while it doesn't find the closing bracket. As the input size increases, the consumption time will also increase until it causes the application to hang or slow down. There was a merged fix but further testing shows the issue persists. This issue should be mitigated by using a safe pattern that won't start backtracking the regular expression due to greedy matching. This issue was fixed in version 4.0.8.

CVSS v3.1 Score

5.3

MEDIUM

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

Weakness Type (CWE)

CWE-1333 CWE-1333

Affected Products

Vendor	Product	Versions
jonschlinkert	micromatch	< 4.0.8

References

Advisories & Patches

https://github.com/micromatch/micromatch/commit/03aa8052171e878897eee5d7bb2ae0ae83ec2ade https://github.com/micromatch/micromatch/pull/266 https://github.com/micromatch/micromatch/pull/247

Exploits

https://advisory.checkmarx.net/advisory/CVE-2024-4067/

Other References

https://devhub.checkmarx.com/cve-details/CVE-2024-4067/ https://github.com/micromatch/micromatch/releases/tag/4.0.8 https://devhub.checkmarx.com/cve-details/CVE-2024-4067/ https://github.com/micromatch/micromatch/blob/2c56a8604b68c1099e7bc0f807ce0865a339747a/index.js#L448 https://github.com/micromatch/micromatch/issues/243

Frequently Asked Questions

What is CVE-2024-4067? +

The NPM package `micromatch` prior to 4.0.8 is vulnerable to Regular Expression Denial of Service (ReDoS). The vulnerability occurs in `micromatch.braces()` in `index.js` because the pattern `.*` will greedily match anything. By passing a malicious payload, the pattern matching will keep backtracking to the input while it doesn't find the closing bracket. As the input size increases, the consumption time will also increase until it causes the application to hang or slow down. There was a merged fix but further testing shows the issue persists. This issue should be mitigated by using a safe pattern that won't start backtracking the regular expression due to greedy matching. This issue was fixed in version 4.0.8. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-4067? +

CVE-2024-4067 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-4067? +

CVE-2024-4067 affects products from jonschlinkert, specifically: micromatch. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-4067? +

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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