NVD / CVE Program· CNA isc

CVE-2020-8624: update-policy rules of type "subdomain" are enforced incorrectly

Noroxi assessment

Priority: Monitor (action score 18/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 3.8% (FIRST EPSS); higher than 90% of all records.
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: bind (Alpine:v3.10) 9.16.6-r0; bind9 (Debian:10) 1:9.11.5.P4+dfsg-5.1+deb10u2; bind9 (Debian:12) 1:9.16.6-1.
Mentioned 6 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to bind (Alpine:v3.10) 9.16.6-r0; bind9 (Debian:10) 1:9.11.5.P4+dfsg-5.1+deb10u2; bind9 (Debian:12) 1:9.16.6-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In BIND 9.9.12 -> 9.9.13, 9.10.7 -> 9.10.8, 9.11.3 -> 9.11.21, 9.12.1 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.9.12-S1 -> 9.9.13-S1, 9.11.3-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker who has been granted privileges to change a specific subset of the zone's content could abuse these unintended additional privileges to update other contents of the zone.

MediumCVSS 4.3 · v3.1—No exploit Fix available

Published: Aug 21, 2020
Updated: Jun 16, 2026
EPSS: 3.8% · 90th percentile
CWE: CWE-269

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 17 / 40 · 4.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 3.8%

CNA vs NVD score

NVD: 4.3
CNA · isc: 4.3; agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
isc	bind	cpe:2.3:a:isc:bind
netapp	steelstore cloud integrated storage	cpe:2.3:a:netapp:steelstore_cloud_integrated_storage
canonical	ubuntu linux	cpe:2.3:o:canonical:ubuntu_linux
debian	debian linux	cpe:2.3:o:debian:debian_linux
fedoraproject	fedora	cpe:2.3:o:fedoraproject:fedora
opensuse	leap	cpe:2.3:o:opensuse:leap

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

canonical ubuntu linux16.04
canonical ubuntu linux18.04
canonical ubuntu linux20.04
debian debian linux10.0
fedoraproject fedora31
fedoraproject fedora32
isc bind9.9.12 and later · up to 9.9.13 inclusive
isc bind9.17.0 and later · up to 9.17.3 inclusive
isc bind9.12.1 and later · up to 9.16.5 inclusive
isc bind9.11.3 and later · up to 9.11.21 inclusive
isc bind9.10.7 and later · up to 9.10.8 inclusive
isc bind9.11.21
isc bind9.11.3
isc bind9.9.12
isc bind9.9.13
netapp steelstore cloud integrated storageall versions
opensuse leap15.1
opensuse leap15.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (isc). Independent of NVD's CPE analysis and usually ahead of it.

ISC BIND9
- 9.9.12 and later · before unspecifiedaffected
- unspecified and later · up to and including 9.9.13affected
- 9.10.7 and later · before unspecifiedaffected
- unspecified and later · up to and including 9.10.8affected
- 9.11.3 and later · before unspecifiedaffected
- unspecified and later · before 9.11.22affected
- 9.12.1 and later · before unspecifiedaffected
- unspecified and later · before 9.16.6affected
- 9.17.0 and later · before unspecifiedaffected
- unspecified and later · before 9.17.4affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Alpine:v3.10	bind	from 9.9.12 · before 9.16.6-r0	9.16.6-r0
Debian:10	bind9	before 1:9.11.5.P4+dfsg-5.1+deb10u2	1:9.11.5.P4+dfsg-5.1+deb10u2
Debian:12	bind9	before 1:9.16.6-1	1:9.16.6-1
openSUSE:Leap 15.1	bind	before 9.16.6-lp151.11.9.1	9.16.6-lp151.11.9.1
openSUSE:Leap 15.1	libuv	before 1.18.0-lp151.3.3.1	1.18.0-lp151.3.3.1
openSUSE:Leap 15.1	sysuser-tools	before 2.0-lp151.4.3.1	2.0-lp151.4.3.1
openSUSE:Leap 15.2	bind	before 9.16.6-lp152.14.3.1	9.16.6-lp152.14.3.1
openSUSE:Leap 15.2	libuv	before 1.18.0-lp152.4.3.1	1.18.0-lp152.4.3.1
openSUSE:Leap 15.2	sysuser-tools	before 2.0-lp152.5.3.1	2.0-lp152.5.3.1
Red Hat:enterprise_linux:7::client	bind	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-chroot	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-debuginfo	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-devel	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-export-devel	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-export-libs	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-libs	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-libs-lite	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-license	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-lite-devel	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-pkcs11	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-pkcs11-devel	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-pkcs11-libs	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-pkcs11-utils	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2
Red Hat:enterprise_linux:7::client	bind-sdb	before 32:9.11.4-26.P2.el7_9.2	32:9.11.4-26.P2.el7_9.2

+49

Same product

isc: all records

Other highest-scoring records for the same primary product.

CVE-2015-5477named in ISC BIND 9.x before 9.9.7-P2 and 9.10.x before 9.10.2-P3 allows remote attackers to cause a denial of service (REQUIRE assertion faKEV
90Now
CVE-2020-8617A logic error in code which checks TSIG validity can be used to trigger an assertion failure in tsig.c
60This week
CVE-2016-2776buffer.c in named in ISC BIND 9 before 9.9.9-P3, 9.10.x before 9.10.4-P3, and 9.11.x before 9.11.0rc3 does not properly construct responses,
60This week

Published before and after this one in the same product

← EarlierCVE-2020-8622Aug 21, 2020 · A truncated TSIG response can lead to an assertion failure
28Monitor
← EarlierCVE-2020-8623Aug 21, 2020 · A flaw in native PKCS#11 code can lead to a remotely triggerable assertion failure in pk11.c
32Monitor
Later →CVE-2020-8625Feb 17, 2021 · A vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack
51Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
alpine:bind	9.16.6-r0 · Alpine:v3.10	Package registry (OSV)
debian:bind9	1:9.16.6-1 · Debian:12	Package registry (OSV)
opensuse:bind	9.16.6-lp152.14.3.1 · openSUSE:Leap 15.2	Package registry (OSV)
opensuse:libuv	1.18.0-lp152.4.3.1 · openSUSE:Leap 15.2	Package registry (OSV)
opensuse:sysuser-tools	2.0-lp152.5.3.1 · openSUSE:Leap 15.2	Package registry (OSV)
red hat:bind	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-chroot	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-debuginfo	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-debugsource	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-devel	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-export-libs-debuginfo	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-libs	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-libs-debuginfo	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-libs-lite	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-libs-lite-debuginfo	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-license	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
red hat:bind-lite-devel	32:9.11.20-5.el8 · Red Hat:enterprise_linux:8::appstream	Package registry (OSV)
suse:bind	9.11.22-3.22.1 · SUSE:OpenStack Cloud 9	Package registry (OSV)
suse:sysuser-tools	2.0-4.2.8 · SUSE:Linux Enterprise Module for Basesystem 15 SP1	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Joop Boonencredativ GmbH for bringing this vulnerability to our attention.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-21-0372 · May 3, 2021(IBM Güvenlik Bülteni Yayınladı)
TR-21-0148 · Feb 18, 2021(IBM, Güvenlik Bülteni Yayınladı)
TR-20-979 · Nov 20, 2020(ISC, BIND için Güvenlik Önerileri Yayınladı)
TR-20-866 · Oct 20, 2020(Jenkins Zafiyeti)
TR-20-865 · Oct 20, 2020(ISC, BIND için Güvenlik Önerileri Yayınladı)
TR-20-630 · Aug 24, 2020(ISC, BIND için Güvenlik Önerileri Yayınladı)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: low · data or configuration can be modified
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: Low
Availability impact: None

Weakness class (CWE)

CWE-269 · Improper Privilege Management

CVSS vector

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

nvd-primary

Root cause

To simplify setup, a service account is granted broad, cluster-wide permissions. The principle of least privilege is skipped during installation.

The bug in code

The whole CWE-269 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

yaml

1kind: ClusterRole
2rules:
3  - apiGroups: ["*"]
4    resources: ["*"]
5    verbs: ["*"]

Fixed

yaml

1kind: Role
2metadata:
3  namespace: lodos-system
4rules:
5  - apiGroups: ["apps"]
6    resources: ["deployments"]
7    verbs: ["get", "list", "update"]

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Abuse Elevation Control MechanismT1548

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

For records you follow, these changes also arrive as notifications. →

References

usn.ubuntu.com/4468-1/

Show all references (9 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records