Have a nice weekend! (PDF love)
Summary: Cisco Talos described a flaw in Adobe Acrobat Reader where a PDF with an embedded JBIG2 image stream, with the sixth bit set in the fifth byte's segment header flag byte, causes AcroRd32.dll to load attacker-controlled bytes and write within multiples of four. The crash affects Acrobat Reader versions 8 and 9 on XP, Linux, and OS X, and Talos said merely displaying the PDF's icon in an explorer or browser window is enough to be compromised.
Key Takeaway: The exposure does not require opening the file: a user who only sees the PDF icon in a folder or browser window is compromised, which removes the click that most awareness training depends on. Talos said Snort rules and SEU 203 coverage would follow, with Clam signatures named Exploit.PDF-26, Exploit.PDF-27, and Exploit.PDF-28.
Read the original at Cisco Talos ↗
- Topics
- Malware
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