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CVE
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CVE-2020-12662Date: (C)2020-05-20   (M)2023-12-22


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.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.5CVSS Score : 5.0
Exploit Score: 3.9Exploit Score: 10.0
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: NONEAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: PARTIAL
Integrity: NONE 
Availability: HIGH 
  
Reference:
DSA-4694
FEDORA-2020-3cfd38fefd
FEDORA-2020-8e9b62948e
FreeBSD-SA-20:19
USN-4374-1
https://lists.debian.org/debian-lts-announce/2021/02/msg00017.html
http://www.openwall.com/lists/oss-security/2020/05/19/5
http://www.nxnsattack.com
https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt
https://security.netapp.com/advisory/ntap-20200702-0006/
https://www.synology.com/security/advisory/Synology_SA_20_12
openSUSE-SU-2020:0912
openSUSE-SU-2020:0913

CPE    3
cpe:/o:debian:debian_linux:9.0
cpe:/o:canonical:ubuntu_linux:18.04::~~lts~~~
cpe:/a:nlnetlabs:unbound
CWE    1
CWE-400
OVAL    20
oval:org.secpod.oval:def:503769
oval:org.secpod.oval:def:503789
oval:org.secpod.oval:def:503770
oval:org.secpod.oval:def:63403
...

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