CVE-2021-25220
DNS forwarders - cache poisoning vulnerability
MEDIUM 6.8
At a glance
- Source
- NVD
- EPSS
- EPSS 3.45 % · percentile 89 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- isc
- NVD status
- Modified
Description
BIND 9.11.0 -> 9.11.36 9.12.0 -> 9.16.26 9.17.0 -> 9.18.0 BIND Supported Preview Editions: 9.11.4-S1 -> 9.11.36-S1 9.16.8-S1 -> 9.16.26-S1 Versions of BIND 9 earlier than those shown - back to 9.1.0, including Supported Preview Editions - are also believed to be affected but have not been tested as they are EOL. The cache could become poisoned with incorrect records leading to queries being made to the wrong servers, which might also result in false information being returned to clients.
Weaknesses (CWE)
- CWE-444 — HTTP Request/Response Smuggling
References
- https://kb.isc.org/v1/docs/cve-2021-25220
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYD7US4HZRFUGAJ66ZTHFBYVP5N3OQBY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/API7U5E7SX7BAAVFNW366FFJGD6NZZKV/
- https://security.netapp.com/advisory/ntap-20220408-0001/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5VX3I2U3ICOIEI5Y7OYA6CHOLFMNH3YQ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2SXT7247QTKNBQ67MNRGZD23ADXU6E5U/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DE3UAVCPUMAKG27ZL5YXSP2C3RIOW3JZ/
- https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf
- https://security.gentoo.org/glsa/202210-25
- https://supportportal.juniper.net/s/article/2022-10-Security-Bulletin-Junos-OS-SRX-Series-Cache-poisoning-vulnerability-in-BIND-used-by-DNS-Proxy-CVE-2021-25220?language=en_US
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N | isc |
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N | NVD · security-officer@isc.org (Secondary) |
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N | NVD · nvd@nist.gov (Secondary) |
| CVSS 2.0 | MEDIUM 4.0 | AV:N/AC:L/Au:S/C:N/I:P/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-12131
- GCVE · GCVE-0-2021-25220
CERT-FR advisories
- CERTFR-2025-AVI-0756 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0027 — Multiples vulnérabilités dans les produits Juniper Networks · cert.ssi.gouv.fr
- CERTFR-2023-AVI-0537 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
- CERTFR-2023-AVI-0276 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2022-AVI-916 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
- CERTFR-2022-AVI-814 — Multiples vulnérabilités dans les produits SIEMENS · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*≥ 9.11.0 < 9.11.37cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:*≥ 9.11.4 < 9.11.37cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*≥ 9.12.0 < 9.16.27cpe:2.3:a:isc:bind:*:*:*:*:supported_preview:*:*:*≥ 9.16.8 < 9.16.27cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*≥ 9.17.0 ≤ 9.18.0cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h300e_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h500e_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h700e_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*cpe:2.3:a:siemens:sinec_ins:*:*:*:*:*:*:*:*< 1.0cpe:2.3:a:siemens:sinec_ins:1.0:-:*:*:*:*:*:*cpe:2.3:a:siemens:sinec_ins:1.0:sp1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*< 19.3cpe:2.3:o:juniper:junos:19.3:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r1-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r2-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r2-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r2-s3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r2-s4:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r2-s5:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r2-s6:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r2-s7:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r3-s1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r3-s2:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r3-s3:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r3-s4:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r3-s5:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.3:r3-s6:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.4:-:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:*cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*- +90 more
Affected products
| Product | Versions |
|---|---|
| ISC · BIND | affected Open Source Branch 9.11 9.11.0 through versions before 9.11.37 ; affected Development Branch 9.17 BIND 9.17 all version ; affected Open Source Branch 9.12-16 9.12.0 through versions before 9.16.27 ; affected Open Source Branch 9.18 9.18.0 ; affected Supported Preview Branch 9.11-S 9.11.0-S through versions before 9.11.37-S ; affected Supported Preview Branch 9.16-S 9.16.0-S through versions before 9.16.27-S |
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 |