CVE-2020-12662
HIGH severity · CVSS 7.5 · Uncontrolled resource consumption
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)3%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: http://www.openwall.com/lists/oss-security/2020/05/19/5 ↗
Additional information
- NVD record
- http://www.openwall.com/lists/oss-security/2020/05/19/5Patch
- https://nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txtAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.htmlAdvisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.htmlAdvisory
- http://www.nxnsattack.com
- https://lists.debian.org/debian-lts-announce/2021/02/msg00017.htmlAdvisory
- 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/