CVE-2020-8624
update-policy rules of type "subdomain" are enforced incorrectly
- Published
- Updated
- Reserved
- Assigned by
- isc
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| iscCNA (assigner) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 3.8% · top 9.9% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Weakness
- Change 4885 inadvertently caused "update-policy" rules of type "subdomain" to be treated as if they were of type "zonesub", allowing updates to all parts of the zone along with the intended subdomain. Affects 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
- CWE-269 (opens in a new tab)All about CWE-269 and its CVEs
Affected products
- affected 9.9.12 – < unspecified
- affected unspecified – ≤ 9.9.13
- affected 9.10.7 – < unspecified
- affected unspecified – ≤ 9.10.8
- affected 9.11.3 – < unspecified
- affected unspecified – < 9.11.22
- affected 9.12.1 – < unspecified
- affected unspecified – < 9.16.6
- affected 9.17.0 – < unspecified
- affected unspecified – < 9.17.4
- affected 9.9.12-S1 – < unspecified
- affected unspecified – ≤ 9.9.13-S1
- affected 9.11.3-S1 – < unspecified
- affected unspecified – < 9.11.22-S1
What to do
Solution: Upgrade to the patched release most closely related to your current version of BIND: BIND 9.11.22 BIND 9.16.6 BIND 9.17.4 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9.11.22-S1
Workaround: No workarounds known.
Exploitation: We are not aware of any active exploits but the issue has been described on a public bug tracker for a Linux distribution.
References (10)
- https://kb.isc.org/docs/cve-2020-8624 (opens in a new tab)x_refsource_CONFIRMx_transferred
- FEDORA-2020-a02b7a0f21 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- https://security.netapp.com/advisory/ntap-20200827-0003/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-4468-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- DSA-4752 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- FEDORA-2020-14c194e5af (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- GLSA-202008-19 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- https://www.synology.com/security/advisory/Synology_SA_20_19 (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2020:1699 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2020:1701 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-8624)Record last updated .