Buffer Overflow in Foxit Reader (CVE-2016-3740)
Summary
Vulnerability in Foxit Reader (CVE-2016-3740). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 8.0 or later.
Original description
The description as published by the source.
Heap-based buffer overflow in the CreateFXPDFConvertor function in ConvertToPdf_x86.dll in Foxit Reader 7.3.4.311 allows remote attackers to execute arbitrary code via a large SamplesPerPixel value in a crafted TIFF image that is mishandled during PDF conversion. This is fixed in 8.0.
Source: NIST National Vulnerability Database NVD
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-2016-3740 has been found in Foxit Reader.
Successful exploitation can lead to full system takeover. CVSS score: 7.8/10.
What to do: upgrade Foxit Reader to 8.0 or later.
If unsure, ask your IT team or search "Foxit Reader CVE-2016-3740" on the vendor's site.
CVE-2016-3740 (Foxit Reader) — CWE-119 / CVSS v3 7.8
Attack vector: local / unauthenticated
Patched: 8.0 — 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-119) exists in Foxit Reader.
Check the vendor advisory for the affected versions of Foxit Reader.
Severity: High (CVSS 7.8/10). Successful exploitation can lead to full system takeover.
Update to 8.0.
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. Audit SBOM/dependencies 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
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Foxit Reader を使っているサービスとバージョンを洗い出す。
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2Apply patch patch
Upgrade Foxit Reader to 8.0ステージング環境で 8.0 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。
References
- advisory 0patch.blogspot.com
- patch foxitsoftware.com