CVE-2020-8616
BIND does not sufficiently limit the number of fetches performed when processing referrals
HIGH 8.6
At a glance
- Source
- NVD
- EPSS
- EPSS 10.88 % · percentile 96 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- isc
- NVD status
- Modified
Description
A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral. This has at least two potential effects: The performance of the recursing server can potentially be degraded by the additional work required to perform these fetches, and The attacker can exploit this behavior to use the recursing server as a reflector in a reflection attack with a high amplification factor.
Weaknesses (CWE)
- CWE-400 — Uncontrolled Resource Consumption (DoS)
References
- https://kb.isc.org/docs/cve-2020-8616
- http://www.nxnsattack.com
- http://www.openwall.com/lists/oss-security/2020/05/19/4
- https://www.debian.org/security/2020/dsa-4689
- https://security.netapp.com/advisory/ntap-20200522-0002/
- https://usn.ubuntu.com/4365-2/
- https://www.synology.com/security/advisory/Synology_SA_20_12
- https://usn.ubuntu.com/4365-1/
- https://lists.debian.org/debian-lts-announce/2020/05/msg00031.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WOGCJS2XQ3SQNF4W6GLZ73LWZJ6ZZWZI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JKJXVBOKZ36ER3EUCR7VRB7WGHIIMPNJ/
- 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 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | isc |
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | NVD · security-officer@isc.org (Secondary) |
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2020-29464
- GCVE · GCVE-0-2020-8616
CERT-FR advisories
- CERTFR-2022-AVI-650 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
- CERTFR-2021-AVI-033 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
- CERTFR-2020-AVI-302 — Multiples vulnérabilités dans Bind · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.0.0 ≤ 9.11.18cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.12.0 ≤ 9.12.4cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.13.0 ≤ 9.13.7cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.14.0 ≤ 9.14.11cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.15.0 ≤ 9.15.6cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.16.0 ≤ 9.16.2cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.17.0 ≤ 9.17.1cpe:2.3:a:isc:bind:9.12.4:p1:*:*:*:*:*:*cpe:2.3:a:isc:bind:9.12.4:p2:*:*:*:*:*:*cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.10.5:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.10.7:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.3:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.5:s3:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.5:s5:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.6:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.7:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.8:s1:*:*:supported_preview:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| ISC · BIND9 | affected 9.0.0 -> 9.11.18, 9.12.0 -> 9.12.4-P2, 9.14.0 -> 9.14.11, 9.16.0 -> 9.16.2, and releases 9.17.0 -> 9.17.1 of the 9.17 experimental development branch. All releases in the obsolete 9.13 and 9.15 development branches. All releases of BIND Supported Preview Edition from 9.9.3-S1 -> 9.11.18-S1 |
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 |