CVE-2016-6171

Published: Feb 9, 2017Modified: May 13, 2026

8.6

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 4.0

Source: NVD

Description

Knot DNS before 2.3.0 allows remote DNS servers to cause a denial of service (memory exhaustion and slave server crash) via a large zone transfer for (1) DDNS, (2) AXFR, or (3) IXFR.

Affected (1)

Products: Knot Dns: Knot Dns

Knot Dns

1 product

Knot Dns

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Knot Dns Knot Dns	Before 2.3.0

Related CWEs

CWE-400

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

References (14)

http://www.openwall.com/lists/oss-security/2016/07/06/3

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2016/07/06/4

Source: secalert@redhat.com

Mailing ListThird Party Advisory

http://www.securityfocus.com/bid/91678

Source: secalert@redhat.com

Third Party AdvisoryVDB Entry

https://github.com/sischkg/xfer-limit/blob/master/README.md

Source: secalert@redhat.com

PatchThird Party Advisory

https://gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adae82/NEWS

Source: secalert@redhat.com

Release NotesVDB Entry

https://gitlab.labs.nic.cz/labs/knot/issues/464

Source: secalert@redhat.com

Vendor Advisory

https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html

Source: secalert@redhat.com

Technical Description

http://www.openwall.com/lists/oss-security/2016/07/06/3