CVE-2020-12662

high

Description

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.

References

https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt

http://www.nxnsattack.com

http://www.openwall.com/lists/oss-security/2020/05/19/5

https://lists.fedoraproject.org/archives/list/[email protected]/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/

https://www.debian.org/security/2020/dsa-4694

https://lists.fedoraproject.org/archives/list/[email protected]/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/

https://www.synology.com/security/advisory/Synology_SA_20_12

https://usn.ubuntu.com/4374-1/

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html

http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html

https://security.netapp.com/advisory/ntap-20200702-0006/

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.asc

https://lists.debian.org/debian-lts-announce/2021/02/msg00017.html

Details

Source: MITRE

Published: 2020-05-19

Updated: 2021-07-21

Type: CWE-674

Risk Information

CVSS v2

Base Score: 5

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

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH