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CVE-2017-9217

Published: 24 May 2017

systemd-resolved through 233 allows remote attackers to cause a denial of service (daemon crash) via a crafted DNS response with an empty question section.

Notes

AuthorNote
tyhicks
I believe that this was introduced in v223 by
https://github.com/systemd/systemd/commit/29815b6c608b836cada5e349d06a96b63eaa65f3
Lennart pointed out in the pull request that systemd-resolved is
respawned after crashing. Therefore, I've rated this as a low priority.
systemd-resolved became the default DNS resolver in Zesty and it is
enabled in Yakkety
systemd-resolved is not used by default in Xenial. It is spawned if a
user execs the systemd-resolve utility but that shouldn't impact the system.

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
systemd
Launchpad, Ubuntu, Debian
trusty Not vulnerable
(204-5ubuntu20.24)
upstream Needed

xenial
Released (229-4ubuntu19)
yakkety Ignored
(end of life)
zesty
Released (232-21ubuntu4)
Patches:
upstream: https://github.com/systemd/systemd/commit/a924f43f30f9c4acaf70618dd2a055f8b0f166be

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H