CVE-2024-53427: jq — Exploit & Fix

Description

decNumberCopy in decNumber.c in jq through 1.7.1 does not properly consider that NaN is interpreted as numeric, which has a resultant stack-based buffer overflow and out-of-bounds write, as demonstrated by use of --slurp with subtraction, such as a filter of .-. when the input has a certain form of digit string with NaN (e.g., "1 NaN123" immediately followed by many more digits).

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CVSS v3.1 Score

8.1

HIGH

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

Weakness Type (CWE)

CWE-843 CWE-843

Affected Products

Vendor	Product	Versions
jqlang	jq	< 1.7.1

References

Advisories & Patches

https://github.com/jqlang/jq/issues/3196 https://github.com/jqlang/jq/issues/3296 https://github.com/jqlang/jq/security/advisories/GHSA-x6c3-qv5r-7q22

Exploits

https://github.com/jqlang/jq/issues/3196

Other References

https://gist.github.com/Ekkosun/a83870ce7f3b7813b9b462a395e8ad92 https://github.com/jqlang/jq/blob/71c2ab509a8628dbbad4bc7b3f98a64aa90d3297/src/decNumber/decNumber.c#L3375

Frequently Asked Questions

What is CVE-2024-53427? +

decNumberCopy in decNumber.c in jq through 1.7.1 does not properly consider that NaN is interpreted as numeric, which has a resultant stack-based buffer overflow and out-of-bounds write, as demonstrated by use of --slurp with subtraction, such as a filter of .-. when the input has a certain form of digit string with NaN (e.g., "1 NaN123" immediately followed by many more digits). It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2024-53427? +

CVE-2024-53427 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-53427? +

CVE-2024-53427 affects products from jqlang, specifically: jq. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-53427? +

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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