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Active Exploitation of Adobe Reader Vulnerabilities

US-CERT has received information that vulnerabilities affecting Adobe Reader are actively being exploited.  These vulnerabilities are exploited through a maliciously crafted PDF file containing a variant of the Zonebac Trojan. 

US-CERT strongly urges users to take the following steps:

  • Update to Adobe Reader 8.1.2.Adobe Reader 8.1.2.
  • Review Adobe Knowledgebase Article kb403079.kb403079.
  • Disable the displaying of PDF documents in the web browser by performing the following steps:
    1. Open Adobe Reader.
    2. Open the Edit menu.
    3. Choose the preferences option.
    4. Choose the Internet section.
    5. Un-check the "Display PDF in browser" check box.
US-CERT will continue to provide information as it becomes available.