Is CVE-2017-9445 actively exploited?

CVE-2017-9445 has no public evidence of in-the-wild exploitation as of 2025-04-20.

What is the CVSS score for CVE-2017-9445?

CVE-2017-9445 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2017-9445?

Patch guidance is available from systemd project security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2017-9445.

Which products are affected by CVE-2017-9445?

1 product: systemd project systemd.

Fix CVE-2017-9445 - HIGH systemd project systemd

Description

In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small. A malicious DNS server can exploit this via a response with a specially crafted TCP payload to trick systemd-resolved into allocating a buffer that's too small, and subsequently write arbitrary data beyond the end of it.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: SYSTEMD_PROJECT
Published: 6/28/2017
Last Modified: 4/20/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

systemd_project : systemd

Remediation Guidance

Executive Summary

Cite this page

CVE-2017-9445. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2017-9445

View on NIST NVD

CVE-2017-9445 vulnerability