Vulnerability in neoan3-apps/template (CVE-2021-41170)
Summary
Vulnerability in neoan3-apps/template (CVE-2021-41170). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 1.1.1 or later.
Original description
The description as published by the source.
neoan3-apps/template is a neoan3 minimal template engine. Versions prior to 1.1.1 have allowed for passing in closures directly into the template engine. As a result values that are callable are executed by the template engine. The issue arises if a value has the same name as a method or function in scope and can therefore be executed either by mistake or maliciously. In theory all users of the package are affected as long as they either deal with direct user input or database values. A multi-step attack on is therefore plausible. Version 1.1.1 has addressed this vulnerability. Unfortunately only working with hardcoded values is safe in prior versions. As this likely defeats the purpose of a template engine, please upgrade.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory 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 CVE-2021-41170 has been found in neoan3-apps/template.
Successful exploitation can lead to full system takeover.
What to do: upgrade neoan3-apps/template to 1.1.1 or later.
If unsure, ask your IT team or search "neoan3-apps/template CVE-2021-41170" on the vendor's site.
CVE-2021-41170 (neoan3-apps/template) — CWE-277
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 1.1.1 — 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 (CWE-277) exists in neoan3-apps/template.
Check the vendor advisory for the affected versions of neoan3-apps/template.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 1.1.1.
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 'neoan3-apps/template' . 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 'neoan3-apps/template' . | 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
neoan3-apps/template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 neoan3-apps/template to 1.1.1ステージング環境で 1.1.1 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。
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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 nvd.nist.gov
- package github.com
- patch github.com
- patch github.com
- patch github.com