Adobe Acrobat and Reader Heap-Based Buffer Overflow Vulnerability
Adobe Acrobat and Reader contain a heap-based buffer overflow vulnerability which could allow remote attackers to execute arbitrary code via a crafted PDF file that triggers memory corruption.
Quick answer
Adobe Acrobat and Reader should be reviewed and updated if it matches the affected versions. The recommended fix is to apply the vendor-supported patched version or the mitigation steps below, then retest the public website with Fixnx.
Who is affected
Affected versions
- Review vendor advisory for affected versions.
Fixed versions
- Apply the latest vendor-supported patched version.
How to fix it
Update Adobe Acrobat and Reader to a vendor-supported release that includes the APSB09-15 fixes, then harden PDF handling. Unsupported Reader or Acrobat versions should be removed because legacy PDF parsing flaws are commonly exploited through email and browser-delivered files.
- Inventory all Acrobat and Reader installations, including terminal servers, VDI images, jump boxes, and shared workstations.
- Upgrade affected Adobe Acrobat and Reader versions to a supported fixed release or remove the product if it is no longer needed.
- Enable Protected Mode, Protected View, automatic updates, and enhanced security settings where available.
- Disable JavaScript in PDFs unless a documented business workflow requires it.
- Block automatic opening of PDF attachments from browsers, webmail, and untrusted download locations.
- Use email and web filtering to quarantine suspicious PDF attachments and exploit kit delivery links.
- Investigate hosts that opened suspicious PDFs before patching and reset credentials if malware activity is detected.
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Verify the fix
- Confirm the installed Acrobat or Reader version is supported and includes the vendor fix for CVE-2009-3459.
- Validate PDF JavaScript and Protected View policy from endpoint management.
- Check EDR and mail security logs for PDF exploit detections or abnormal Reader child processes.
- Open a benign PDF from the normal workflow and verify security prompts and sandboxing behave as expected.
- Run a Fixnx scan and confirm public download or document workflows do not expose outdated Adobe guidance.
Related categories
Trusted references
FAQ
What is affected by CVE-2009-3459?
Adobe Acrobat and Reader should be checked against the vendor advisory and trusted references linked on this page.
What should I fix first?
Start with internet-facing sites, admin panels, login flows, plugins, themes, modules, packages, and systems that process user-controlled input or sensitive data.
How do I confirm the fix worked?
Apply the patched version or mitigation, clear caches where relevant, retest the affected workflow, and run a new Fixnx scan to verify public website exposure signals.
Why can this risk appear in multiple categories?
A vulnerability can belong to more than one platform or ecosystem. Fixnx keeps one canonical risk page while also listing it in every relevant category.