CVE-2025-62408

Description

c-ares is an asynchronous resolver library. Versions 1.32.3 through 1.34.5 terminate a query after maximum attempts when using read_answer() and process_answer(), which can cause a Denial of Service. This issue is fixed in version 1.34.6.

CVSS v3.1 Score

5.9

MEDIUM

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

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor	Product	Versions
c-ares	c-ares	1.32.3 — 1.34.6

References

Advisories & Patches

https://github.com/c-ares/c-ares/commit/714bf5675c541bd1e668a8db8e67ce012651e618 https://github.com/c-ares/c-ares/security/advisories/GHSA-jq53-42q6-pqr5

Frequently Asked Questions

What is CVE-2025-62408? +

c-ares is an asynchronous resolver library. Versions 1.32.3 through 1.34.5 terminate a query after maximum attempts when using read_answer() and process_answer(), which can cause a Denial of Service. This issue is fixed in version 1.34.6. It has a CVSS v3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2025-62408? +

CVE-2025-62408 has a CVSS v3.1 score of 5.9 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-2025-62408? +

CVE-2025-62408 affects products from c-ares, specifically: c-ares. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-62408? +

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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