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CVE-2017-15908

Published: 26 October 2017

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.

Notes

AuthorNote
mdeslaur
resolve only used by default on zesty+
independently discovered by Nelson William Gamazo Sanchez,
working with Trend Micro's Zero Day Initiative

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
systemd
Launchpad, Ubuntu, Debian
upstream Needs triage

precise Does not exist

trusty Not vulnerable
(code not present)
xenial
Released (229-4ubuntu21.1)
zesty
Released (232-21ubuntu7.1)
artful
Released (234-2ubuntu12.1)
Patches:
upstream: https://github.com/systemd/systemd/pull/7184
upstream: https://github.com/systemd/systemd/commit/9f939335a07085aa9a9663efd1dca06ef6405d62