TCP-pipelined queries can bypass tcp-clients limit (ISC BIND9)
At a glance
- Source
- NVD
- EPSS
- EPSS 4.13 % · percentile 91 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- isc
- NVD status
- Modified
Description
With pipelining enabled each incoming query on a TCP connection requires a similar resource allocation to a query received via UDP or via TCP without pipelining enabled. A client using a TCP-pipelined connection to a server could consume more resources than the server has been provisioned to handle. When a TCP connection with a large number of pipelined queries is closed, the load on the server releasing these multiple resources can cause it to become unresponsive, even for queries that can be answered authoritatively or from cache. (This is most likely to be perceived as an intermittent server problem).
Weaknesses (CWE)
- CWE-400 — Uncontrolled Resource Consumption
References
- https://kb.isc.org/docs/cve-2019-6477
- https://www.synology.com/security/advisory/Synology_SA_19_39
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XGURMGQHX45KR4QDRCSUQHODUFOGNGAN/
- https://support.f5.com/csp/article/K15840535?utm_source=f5support&%3Butm_medium=RSS
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L3DEMNZMKR57VQJCG5ZN55ZGTQRL2TFQ/
- https://www.debian.org/security/2020/dsa-4689
- 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 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2019-16037
- GCVE · GCVE-0-2019-6477
CERT-FR advisories
- CERTFR-2021-AVI-141 — Vulnérabilité dans F5 BIG-IP · cert.ssi.gouv.fr
- CERTFR-2019-AVI-585 — Vulnérabilité dans BIND · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.11.7 ≤ 9.11.12cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.14.1 ≤ 9.14.7cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*≥ 9.15.0 ≤ 9.15.5cpe:2.3:a:isc:bind:9.11.5:s6:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.11.6:p1:*:*:*:*:*:*cpe:2.3:a:isc:bind:9.11.6:rc1:*:*:*:*:*:*cpe:2.3:a:isc:bind:9.11.12:s1:*:*:supported_preview:*:*:*cpe:2.3:a:isc:bind:9.12.4:p1:*:*:*:*:*:*cpe:2.3:a:isc:bind:9.12.4:p2:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| ISC · BIND9 | affected 9.11.6-P1 -> 9.11.12, 9.12.4-P1 -> 9.12.4-P2, 9.14.1 -> 9.14.7, and versions 9.11.5-S6 -> 9.11.12-S1 of BIND 9 Supported Preview Edition. Versions 9.15.0 -> 9.15.5 of the BIND 9.15 development branch are also affected |
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 |