CVE-2017-9445

7.5 highEPSS 55%

High (7.5) in systemd project systemd. EPSS 55% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 55% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CWE: CWE-787
Published: 2017-06-28
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

systemd_project:systemd

References

http://openwall.com/lists/oss-security/2017/06/27/8
http://www.securityfocus.com/bid/99302
http://www.securitytracker.com/id/1038806
https://launchpad.net/bugs/1695546
http://openwall.com/lists/oss-security/2017/06/27/8

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