High severity · published May 19, 2020
CVE-2020-12662
Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue
7.5
CVSS
3.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.2% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
9.0; 10.0 · source: NVD
FE
Fedora · Fedoraproject
31; 32 · source: NVD
LE
Leap · Opensuse
15.1; 15.2 · source: NVD
UL
Ubuntu Linux · Canonical
18.04; 19.10; 20.04 · source: NVD
UN
Unbound · Nlnetlabs
before 1.10.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-12662
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-12662
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html
Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html
Technical Description
http://www.nxnsattack.com
Mailing List
http://www.openwall.com/lists/oss-security/2020/05/19/5
Mailing List
https://lists.debian.org/debian-lts-announce/2021/02/msg00017.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/
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