Vulnerability in samba
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-2018-16857 has been found in samba.
Data can be tampered with by attackers.
What to do: upgrade samba to 2:4.9.2+dfsg-2 or later.
If unsure, ask your IT team or search "samba DEBIAN-CVE-2018-16857" on the vendor's site.
DEBIAN-CVE-2018-16857 (samba)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 2:4.9.2+dfsg-2 — 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 samba.
Check the vendor advisory for the affected versions of samba.
Severity: ?. Data can be tampered with by attackers.
Update to 2:4.9.2+dfsg-2.
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 'samba' . 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 'samba' . | 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
samba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 samba to 2:4.9.2+dfsg-2ステージング環境で 2:4.9.2+dfsg-2 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 | samba |
< 2:4.9.2+dfsg-2 |
2:4.9.2+dfsg-2 |
| Debian:13 | samba |
< 2:4.9.2+dfsg-2 |
2:4.9.2+dfsg-2 |
| Debian:14 | samba |
< 2:4.9.2+dfsg-2 |
2:4.9.2+dfsg-2 |
Original description The description as published by the source.
Samba from version 4.9.0 and before version 4.9.3 that have AD DC configurations watching for bad passwords (to restrict brute forcing of passwords) in a window of more than 3 minutes may not watch for bad passwords at all. The primary risk from this issue is with regards to domains that have been upgraded from Samba 4.8 and earlier. In these cases the manual testing done to confirm an organisation's password policies apply as expected may not have been re-done after the upgrade.
Source: OSV.dev (Open Source Vulnerabilities) OSV
References
- advisory security-tracker.debian.org