Vulnerability in rails
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-2021-22881 has been found in rails.
Attackers can target a specific entry point like Host over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade rails to 2:6.0.3.5+dfsg-1 or later.
If unsure, ask your IT team or search "rails DEBIAN-CVE-2021-22881" on the vendor's site.
DEBIAN-CVE-2021-22881 (rails)
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: Host
Patched: 2:6.0.3.5+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.
A vulnerability (unclassified) exists in rails. Attackers reach the vulnerable code path via Host without authentication.
Check the vendor advisory for the affected versions of rails. Attack surface: Host.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 2:6.0.3.5+dfsg-1.
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 'rails' . 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 'rails' . | 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
rails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 rails to 2:6.0.3.5+dfsg-1ステージング環境で 2:6.0.3.5+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 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 | rails |
< 2:6.0.3.5+dfsg-1 |
2:6.0.3.5+dfsg-1 |
| Debian:13 | rails |
< 2:6.0.3.5+dfsg-1 |
2:6.0.3.5+dfsg-1 |
| Debian:14 | rails |
< 2:6.0.3.5+dfsg-1 |
2:6.0.3.5+dfsg-1 |
Original description The description as published by the source.
The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an open redirect vulnerability. Specially crafted Host headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. Impacted applications will have allowed hosts with a leading dot. When an allowed host contains a leading dot, a specially crafted Host header can be used to redirect to a malicious website.
Source: OSV.dev (Open Source Vulnerabilities) OSV
References
- advisory security-tracker.debian.org