CVE-2017-11104

Knot DNS before 2.4.5 and 2.5.x before 2.5.2 contains a flaw within the TSIG protocol implementation that would allow an attacker with a valid key name and algorithm to bypass TSIG authentication if no additional ACL restrictions are set, because of an improper TSIG validity period check.

CVSS v3.0 5.9 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.9^/10

CVSS v3.0 : MEDIUM

Vector : AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://lists.nic.cz/pipermail/knot-dns-users/2017-June/001144.html	Mailing List Patch Third Party Advisory
https://bugs.debian.org/865678	Issue Tracking Third Party Advisory
http://www.synacktiv.ninja/ressources/Knot_DNS_TSIG_Signature_Forgery.pdf	Exploit Mitigation Patch Third Party Advisory
http://www.securityfocus.com/bid/99598
http://www.debian.org/security/2017/dsa-3910
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00078.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00076.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00089.html
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00049.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:knot-dns:knot_dns:2.5.0:::::::*
	cpe:2.3:a:knot-dns:knot_dns:2.5.1:::::::*
	cpe:2.3:a:knot-dns:knot_dns::::::::

Information

Published : 2017-07-08 10:29

Updated : 2020-09-18 19:15

NVD link : CVE-2017-11104

Mitre link : CVE-2017-11104

JSON object : View

Products Affected

knot-dns

knot_dns

CWE

CWE-20

Improper Input Validation

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