CVE-2016-6171

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.

CVSS v3 8.6 HIGH
CVSS v2.0 5.0 MEDIUM

8.6^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
http://www.openwall.com/lists/oss-security/2016/07/06/3	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/07/06/4	Mailing List Third Party Advisory
http://www.securityfocus.com/bid/91678	Third Party Advisory VDB Entry
https://github.com/sischkg/xfer-limit/blob/master/README.md	Patch Third Party Advisory
https://gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adae82/NEWS	Release Notes VDB Entry
https://gitlab.labs.nic.cz/labs/knot/issues/464	Vendor Advisory
https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html	Technical Description
http://www.openwall.com/lists/oss-security/2016/07/06/3	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/07/06/4	Mailing List Third Party Advisory
http://www.securityfocus.com/bid/91678	Third Party Advisory VDB Entry
https://github.com/sischkg/xfer-limit/blob/master/README.md	Patch Third Party Advisory
https://gitlab.labs.nic.cz/labs/knot/blob/c546a70563ef4c7badb7cb5bdf6d1ba8e7adae82/NEWS	Release Notes VDB Entry
https://gitlab.labs.nic.cz/labs/knot/issues/464	Vendor Advisory
https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html	Technical Description

Configurations

Configuration 1 (hide)

cpe:2.3:a:knot-dns:knot_dns:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2017-02-09 15:59

Updated : 2026-06-17 00:50

NVD link : CVE-2016-6171

Mitre link : CVE-2016-6171

CVE.ORG link : CVE-2016-6171

JSON object : View

Products Affected

knot-dns

knot_dns

CWE

CWE-400

Uncontrolled Resource Consumption

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