CVE-2020-12662: canonical ubuntu_linux Uncontrolled Resource Consumption
CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2020-12662UBUNTU-CVE-2020-12662DEBIAN-CVE-2020-12662
Published 19-05-2020Last modified 04-08-2024
Vulnerability summary
CVE-2020-12662 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in canonical ubuntu_linux. EPSS estimates a 3.20% chance of exploitation in the next 30 days, higher than 87.9% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (NVD)EPSS score
3.20%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 15 · Related 6Timeline
- 19-05-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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 metrics
5 scores · 4 sources · 2 versionsHigh 7.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
3.20%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
0.00 pp
From 3.20% on 19-09-2026
19-09-202619-10-2026
EPSS score3.20%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- unbound< 1.10.1-1
- debian_linuxEOL9.0 | 10.0
Alpine1 product
- unbound< 1.9.1-r8 | < 1.9.6-r1 | < 1.10.1-r0 | < 1.8.3-r4
Canonical1 product
- ubuntu_linuxEOL18.04 | 19.10 | 20.04
Fedoraproject1 product
- fedoraEOL31 | 32
Nlnetlabs1 product
- unbound< 1.10.1
Opensuse1 product
- leapEOL15.1 | 15.2
Ubuntu1 product
- unboundAll versions (No fix recorded) | < 1.6.7-1ubuntu2.3 | < 1.9.4-2ubuntu1.1
7 vendors · 8 products
References
20 links- www.openwall.com/lists/oss-security/2020/05/19/5Mailing ListX Refsource MLISTPatchThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
Show all 20 references
- security.freebsd.org/advisories/FreeBSD-SA-20:19.unbound.ascVendor AdvisoryX Refsource FREEBSDThird Party Advisory
- lists.debian.org/debian-lts-announce/2021/02/msg00017.htmlMailing ListX Refsource MLISTThird Party Advisory
