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CVE-2020-12662

Good to know:

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Date: May 19, 2020

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.

Language: C

Severity Score

Related Resources (21)

https://security.netapp.com/advisory/ntap-20200702-0006/
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.asc
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/
https://nvd.nist.gov/vuln/detail/CVE-2020-12662
http://www.openwall.com/lists/oss-security/2020/05/19/5
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-12662
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/
https://security.alpinelinux.org/vuln/CVE-2020-12662
https://security-tracker.debian.org/tracker/CVE-2020-12662
https://www.debian.org/security/2020/dsa-4694
https://www.synology.com/security/advisory/Synology_SA_20_12
https://lists.debian.org/debian-lts-announce/2021/02/msg00017.html
https://access.redhat.com/security/cve/CVE-2020-12662
http://www.nxnsattack.com
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/
https://usn.ubuntu.com/4374-1/
https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html
https://www.mend.io/vulnerability-database/CVE-2020-12662

Severity Score

Weakness Type (CWE)

Uncontrolled Recursion

CWE-674

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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