CVE Vulnerability

CVE-2020-12662

Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt Vendor Advisory
http://www.nxnsattack.com Technical Description
http://www.openwall.com/lists/oss-security/2020/05/19/5 Mailing List Patch
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/ Mailing List Third Party Advisory
https://www.debian.org/security/2020/dsa-4694 Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/ Mailing List Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_12 Third Party Advisory
https://usn.ubuntu.com/4374-1/ Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20200702-0006/ Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.asc Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00017.html Mailing List Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
Information

Published : 2020-05-19 02:15

Updated : 2021-07-21 11:39

NVD link : CVE-2020-12662

Mitre link : CVE-2020-12662

Products Affected

Nlnetlabs

Unbound

CWE
CWE-400