CVE-2020-8621
Attempting QNAME minimization after forwarding can lead to an assertion failure in resolver.c
HIGH 7.5
At a glance
- Source
- NVD
- EPSS
- EPSS 3.06 % · percentile 88 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- isc
- NVD status
- Modified
Description
In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected.
Weaknesses (CWE)
- CWE-617 — Reachable Assertion
References
- https://kb.isc.org/docs/cve-2020-8621
- https://security.netapp.com/advisory/ntap-20200827-0003/
- https://usn.ubuntu.com/4468-1/
- https://security.gentoo.org/glsa/202008-19
- https://www.synology.com/security/advisory/Synology_SA_20_19
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | isc |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · security-officer@isc.org (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2020-29469
- GCVE · GCVE-0-2020-8621
CERT-FR advisories
- CERTFR-2020-AVI-523 — Multiples vulnérabilités dans BIND · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.14.0 ≤ 9.16.5cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.17.0 ≤ 9.17.3cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*cpe:2.3:a:synology:dns_server:*:*:*:*:*:*:*:*< 2.2.2-5027cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| ISC · BIND9 | affected 9.14.0 < * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |