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.

Published: May 19, 2020
Updated: Apr 13, 2023
CVE: CVE-2020-12662
Severity: High
Exploit:

CVSS v3:

Severity: High
Score: 7.5
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

Severity: Medium
Score: 5
AV:N/AC:L/Au:N/C:N/I:N/A:P

CWEs:

CWE-400

Affected Software
References

Software	From	Fixed in
nlnetlabs / unbound	-	1.10.1
debian / debian_linux	9.0	9.0.x
debian / debian_linux	10.0	10.0.x
opensuse / leap	15.1	15.1.x
opensuse / leap	15.2	15.2.x
canonical / ubuntu_linux	18.04	18.04.x
canonical / ubuntu_linux	19.10	19.10.x
canonical / ubuntu_linux	20.04	20.04.x
fedoraproject / fedora	31	31.x
fedoraproject / fedora	32	32.x

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html
http://www.nxnsattack.com
http://www.openwall.com/lists/oss-security/2020/05/19/5
https://lists.debian.org/debian-lts-announce/2021/02/msg00017.html
https://lists.fedoraproject.org/archives/list/[email protected]/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/
https://lists.fedoraproject.org/archives/list/[email protected]/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/
https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.asc
https://security.netapp.com/advisory/ntap-20200702-0006/
https://usn.ubuntu.com/4374-1/
https://www.debian.org/security/2020/dsa-4694
https://www.synology.com/security/advisory/Synology_SA_20_12

Vulnerability Database

289,697

CVE-2020-12662