CVE-2021-25219
Lame cache can be abused to severely degrade resolver performance
MEDIUM 5.3
At a glance
- Source
- NVD
- EPSS
- EPSS 11.16 % · percentile 96 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- isc
- NVD status
- Modified
Description
In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing.
References
- https://kb.isc.org/v1/docs/cve-2021-25219
- https://www.debian.org/security/2021/dsa-4994
- https://lists.debian.org/debian-lts-announce/2021/11/msg00001.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTKC4E3HUOLYN5IA4EBL4VAQSWG2ZVTX/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YGV7SA27CTYLGFJSPUM3V36ZWK7WWDI4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EF4NAVRV4H3W4GA3LGGZYUKD3HSJBAVW/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://security.netapp.com/advisory/ntap-20211118-0002/
- https://security.gentoo.org/glsa/202210-25
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | isc |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | NVD · security-officer@isc.org (Secondary) |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | 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-2021-12130
- GCVE · GCVE-0-2021-25219
CERT-FR advisories
- CERTFR-2025-AVI-0756 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2022-AVI-216 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
- CERTFR-2021-AVI-838 — Vulnérabilité dans les produits Synology · cert.ssi.gouv.fr
- CERTFR-2021-AVI-828 — Vulnérabilité dans ISC BIND · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*≥ 9.3.0 < 9.11.36cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*≥ 9.12.0 < 9.16.22cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*≥ 9.17.0 < 9.17.19cpe:2.3:a:isc:bind:9.9.3:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.9.12:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.9.13: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:9.11.5:s6:*:*: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:a:isc:bind:9.11.12:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.21:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.27:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.29:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.35:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.16.8:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.16.11:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.16.21:s1:*:*:supported_preview:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*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:netapp:cloud_backup:-:*:*:*:*:*:*:*cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*< 1.0.1.1- +3 more
Affected products
| Product | Versions |
|---|---|
| ISC · BIND9 | affected Open Source Branches 9.3 through 9.11 9.3.0 through versions before 9.11.36 ; affected Open Source Branches 9.12 through 9.16 9.12.0 through versions before 9.16.22 ; affected Supported Preview Branches 9.9-S through 9.11-S 9.9.3-S1 through versions before 9.11.36-S1 ; affected Supported Preview Branch 9.16-S 9.16.8-S1 through versions before 9.16.22-S1 ; affected Development Branch 9.17 9.17.0 through versions before 9.17.19 |
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 |