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CVE-2017-1000232

29
FAUCET Score

CVE-2017-1000232 describes a critical double-free vulnerability in the str2host.c component of ldns version 1.7.0, a DNS library developed by NLnet Labs. This flaw carries a CVSS score of 9.8, indicating a severe impact with high confidentiality, integrity, and availability compromise, and can be exploited remotely without authentication or user interaction. Despite its critical nature, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
1.7.0CPE matchmatch criteria
cpe:2.3:a:nlnetlabs:ldns:1.7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.30%
Probability of exploitation in next 30 days
EPSS Percentile
81.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0230 is in the 71st percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

microsoftpatch availablevia msrc
Product: cbl2 ldns 1.7.0-32 on CBL Mariner 2.0Fixed in: 1.7.0-32
microsoftpatch availablevia msrc
Product: cbl2 ldns 1.7.0-31 on CBL Mariner 2.0Fixed in: 1.7.0-31
microsoftpatch availablevia msrc
Product: 16887-16823Fixed in: 1.7.0-32
microsoftpatch availablevia msrc
Product: 16888-16823Fixed in: 1.7.0-31
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 1.7.0-32
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 1.7.0-32

Vendor Advisories (3)

microsoft2022-Aug/CVE-2017-1000232

CVE-2017-1000232

Aug 9, 2022
microsoft2017-Nov/CVE-2017-1000232Critical

A double-free vulnerability in str2host.c in ldns 1.7.0 have unspecified impact and attack vectors.

Nov 14, 2017
redhatCVE-2017-1000232Moderate

ldns: Memory corruption in ldns_str2rdf_long_str

Apr 26, 2017

References

lists.opensuse.org / opensuse-security-announce/2020-04/msg00000.html
nlnetlabs.nl / bugs-script/show_bug.cgi
ExploitVendor Advisory