Adobe released some updates for Adobe Reader 9.1 and Acrobat 9.1. The company said that these updates solve the recent JBIG2 security issue (If you’re geeky and know CVE, the exact vulnerability is CVE-2009-0658).
Quoting the Adobe Product Security Incident Response Team
We encourage all Adobe Reader users to download and install the free Adobe Reader 9.1. The Adobe Reader 9.1 update is available here. Acrobat 9 users should refer to the Security Bulletin for download details
Read complete details here.
Calling all PDF files users, time to patch up your Acrobat readers. I tried it and its around 40 MB of download. Who uses PDFs? Let me see, free ebooks from blogs and sites usually comes in PDFs so that’s one group.
Hope this helps.