VulnerabilityModified
CVE-2020-12662
Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue.
HIGH 7.5EPSS 3.17%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.17% probability · 87th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- nlnetlabs/unbound · debian/debian linux · opensuse/leap · canonical/ubuntu linux · fedoraproject/fedora
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.htmlMailing List, Third Party Advisory
- http://www.nxnsattack.comTechnical Description
- http://www.openwall.com/lists/oss-security/2020/05/19/5Mailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00017.htmlMailing List, Third Party Advisory
- 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.txtVendor Advisory
- https://security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.ascThird Party Advisory
- https://security.netapp.com/advisory/ntap-20200702-0006/Third Party Advisory
- https://usn.ubuntu.com/4374-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4694Third Party Advisory
- https://www.synology.com/security/advisory/Synology_SA_20_12Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.htmlMailing List, Third Party Advisory
- http://www.nxnsattack.comTechnical Description
- http://www.openwall.com/lists/oss-security/2020/05/19/5Mailing List, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00017.htmlMailing List, Third Party Advisory
- 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.txtVendor Advisory
- https://security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.ascThird Party Advisory
- https://security.netapp.com/advisory/ntap-20200702-0006/Third Party Advisory
- https://usn.ubuntu.com/4374-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4694Third Party Advisory
- https://www.synology.com/security/advisory/Synology_SA_20_12Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.