Vulnerability in ruby-sinatra (UBUNTU-CVE-2022-45442)
Summary
Vulnerability in ruby-sinatra (UBUNTU-CVE-2022-45442). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 1.4.7-3ubuntu0.1~esm2 or later.
Original description
The description as published by the source.
Sinatra is a domain-specific language for creating web applications in Ruby. An issue was discovered in Sinatra 2.0 before 2.2.3 and 3.0 before 3.0.4. An application is vulnerable to a reflected file download (RFD) attack that sets the Content-Disposition header of a response when the filename is derived from user-supplied input. Version 2.2.3 and 3.0.4 contain patches for this issue.
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 UBUNTU-CVE-2022-45442 has been found in ruby-sinatra.
Successful exploitation can lead to full system takeover.
What to do: upgrade ruby-sinatra to 1.4.7-3ubuntu0.1~esm2 or later.
If unsure, ask your IT team or search "ruby-sinatra UBUNTU-CVE-2022-45442" on the vendor's site.
UBUNTU-CVE-2022-45442 (ruby-sinatra)
Attack vector: remote (network-reachable) / unauthenticated
Patched: 1.4.7-3ubuntu0.1~esm2 — 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 ruby-sinatra.
Check the vendor advisory for the affected versions of ruby-sinatra.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 1.4.7-3ubuntu0.1~esm2.
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 'ruby-sinatra' . 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
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1Identify exposure identify
grep -r 'ruby-sinatra' . | 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
ruby-sinatraを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade ruby-sinatra to 1.4.7-3ubuntu0.1~esm2ステージング環境で 1.4.7-3ubuntu0.1~esm2 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。
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3Post-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
References
- advisory ubuntu.com
- report ubuntu.com
- report github.com
- report github.com
- report github.com
- report blackhat.com
- report cve.org