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CVE-2024-4367 high CVSS 8.8

Vulnerability in pdfjs-dist (CVE-2024-4367)

Summary

Vulnerability in pdfjs-dist (CVE-2024-4367). Successful exploitation can lead to full system takeover. Exploitable via isEvalSupported. Mitigation: upgrade to 4.2.67 or later.

Original description

The description as published by the source.

A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.

Source: NIST National Vulnerability Database NVD GitHub Advisory

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-2024-4367 has been found in pdfjs-dist.
Attackers can target a specific entry point like isEvalSupported over the network to misuse the product.
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: upgrade pdfjs-dist to 4.2.67 or later.
If unsure, ask your IT team or search "pdfjs-dist CVE-2024-4367" on the vendor's site.

CVE-2024-4367 (pdfjs-dist) — CWE-754 / CVSS v3 8.8
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: isEvalSupported / true / eval / false
Patched: 4.2.67 — apply immediately
Workaround: Set the option isEvalSupported to false.
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 (CWE-754) exists in pdfjs-dist. Attackers reach the vulnerable code path via isEvalSupported without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of pdfjs-dist. Attack surface: isEvalSupported / true / eval / false.

🔥 Severity

Severity: High (CVSS 8.8/10). Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 4.2.67.

🛡️ Workaround

Workaround: Set the option isEvalSupported to false.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'pdfjs-dist' . 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. 1
    Identify exposure identify 
    grep -r 'pdfjs-dist' . | 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 pdfjs-dist を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply temporary workaround mitigate 
    Set the option `isEvalSupported` to `false`.

    パッチが適用されるまでの応急処置として、Set the option isEvalSupported to false. を実施。回避策の副作用 (機能低下) を確認した上で。

  3. 3
    Apply patch patch 
    Upgrade pdfjs-dist to 4.2.67

    ステージング環境で 4.2.67 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。

  4. 4
    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

npm pdfjs-dist
[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.2.67"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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