Vulnerability in ntp (DEBIAN-CVE-2015-7703)

Summary

Vulnerability in ntp (DEBIAN-CVE-2015-7703). Data can be tampered with by attackers. Mitigation: upgrade to 1:4.2.8p4+dfsg-1 or later.

Original description

The description as published by the source.

The "pidfile" or "driftfile" directives in NTP ntpd 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77, when ntpd is configured to allow remote configuration, allows remote attackers with an IP address that is allowed to send configuration requests, and with knowledge of the remote configuration password to write to arbitrary files via the :config command.

Source: OSV.dev (Open Source Vulnerabilities) OSV

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-2015-7703 has been found in ntp.
Data can be tampered with by attackers.
What to do: upgrade ntp to 1:4.2.8p4+dfsg-1 or later.
If unsure, ask your IT team or search "ntp DEBIAN-CVE-2015-7703" on the vendor's site.

DEBIAN-CVE-2015-7703 (ntp)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 1:4.2.8p4+dfsg-1 — 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.

❓ What is the problem

A vulnerability (unclassified) exists in ntp.

📍 Affected scope

Check the vendor advisory for the affected versions of ntp.

🔥 Severity

Severity: ?. Data can be tampered with by attackers.

🔧 How to fix

Update to 1:4.2.8p4+dfsg-1.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'ntp' . 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 exposure identify
```
grep -r 'ntp' . | 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 ntp 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 patch patch
```
Upgrade ntp to 1:4.2.8p4+dfsg-1
```
ステージング環境で 1:4.2.8p4+dfsg-1 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 verification verify
```
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

Debian:11 ntp

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.2.8p4+dfsg-1"}]}]

References

advisory security-tracker.debian.org