CVE-2017-15908

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 23.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-10-26 · updated 2026-06-17
Weakness: CWE-835

Description

In systemd 223 through 235, a remote DNS server can respond with a custom crafted DNS NSEC resource record to trigger an infinite loop in the dns_packet_read_type_window() function of the 'systemd-resolved' service and cause a DoS of the affected service.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04
systemd: 223, 224, 225, 226, 227, 228 (+7)

References

http://www.securityfocus.com/bid/101600
http://www.securitytracker.com/id/1039662
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1725351
https://github.com/systemd/systemd/pull/7184
https://usn.ubuntu.com/3558-1/
http://www.securityfocus.com/bid/101600
http://www.securitytracker.com/id/1039662
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1725351
https://github.com/systemd/systemd/pull/7184
https://usn.ubuntu.com/3558-1/

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