CVE-2017-9445

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 54.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-06-28 · updated 2026-06-17
Weakness: CWE-787

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.

Affected products

systemd: from 223 through 233

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
http://www.securityfocus.com/bid/99302
http://www.securitytracker.com/id/1038806
https://launchpad.net/bugs/1695546

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