What is CVE-2017-1000381?

CVE-2017-1000381 is a high-severity vulnerability in C-Ares, classified under Information Disclosure. CVSS score: 7.5/10. Published 2017-07-07.

How severe is CVE-2017-1000381?

High severity. CVSS v3 base score is 7.5 out of 10.

Information disclosure in C-Ares

CVE-2017-1000381

The c-ares function `ares_parse_naptr_reply()`, which is used for parsing NAPTR responses, could be triggered to read memory outside of the given input buffer if the passed in DNS response packet was crafted in a particular way.

Vulnerability class: Information Disclosure

Published 2017-07-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.033 (88.4th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 88.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

C-Ares — versions 1.8.0, 1.9.0, 1.9.1
C-Ares Project — versions 1.11.0
Node.js

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

c-ares.haxx.se/0616.patch (Mailing List, Vendor Advisory)
www.securityfocus.com/bid/99148 (VDB Entry, Third Party Advisory, vdb-entry)
c-ares.haxx.se/adv_20170620.html (Vendor Advisory)

Frequently asked questions

What is CVE-2017-1000381?: CVE-2017-1000381 is a high-severity vulnerability in C-Ares, classified under Information Disclosure. CVSS score: 7.5/10. Published 2017-07-07.
How severe is CVE-2017-1000381?: High severity. CVSS v3 base score is 7.5 out of 10.