Vulnerability in bind9
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as DEBIAN-CVE-2018-5743 has been found in bind9.
Risk of unauthorized operations or information disclosure.
What to do: upgrade bind9 to 1:9.11.5.P4+dfsg-4 or later.
If unsure, ask your IT team or search "bind9 DEBIAN-CVE-2018-5743" on the vendor's site.
DEBIAN-CVE-2018-5743 (bind9)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 1:9.11.5.P4+dfsg-4 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (unclassified) exists in bind9.
Check the vendor advisory for the affected versions of bind9.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 1:9.11.5.P4+dfsg-4.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'bind9' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1
Identify exposureidentify
grep -r 'bind9' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
bind9を grep し、稼働しているサービス・バージョンを把握する。 -
2
Apply patchpatch
Upgrade bind9 to 1:9.11.5.P4+dfsg-4ステージング環境で 1:9.11.5.P4+dfsg-4 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3
Post-deployment verificationverify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
| Ecosystem | Package | Affected | Fixed |
|---|---|---|---|
| Debian:12 | bind9 |
< 1:9.11.5.P4+dfsg-4 |
1:9.11.5.P4+dfsg-4 |
| Debian:13 | bind9 |
< 1:9.11.5.P4+dfsg-4 |
1:9.11.5.P4+dfsg-4 |
| Debian:14 | bind9 |
< 1:9.11.5.P4+dfsg-4 |
1:9.11.5.P4+dfsg-4 |
Original description The description as published by the source.
By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -> 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743.
Source: OSV.dev (Open Source Vulnerabilities) OSV
References
- advisory security-tracker.debian.org