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
Author | Note |
---|---|
mdeslaur | resolve only used by default on zesty+ independently discovered by Nelson William Gamazo Sanchez, working with Trend Micro's Zero Day Initiative |
Priority
Status
Package | Release | Status |
---|---|---|
systemd Launchpad, Ubuntu, Debian |
artful |
Released
(234-2ubuntu12.1)
|
trusty |
Not vulnerable
(code not present)
|
|
upstream |
Needs triage
|
|
xenial |
Released
(229-4ubuntu21.1)
|
|
zesty |
Released
(232-21ubuntu7.1)
|
|
Patches: upstream: https://github.com/systemd/systemd/pull/7184 upstream: https://github.com/systemd/systemd/commit/9f939335a07085aa9a9663efd1dca06ef6405d62 |
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 |