Adobe has announced that a critical vulnerability exists in Adobe Reader 9.3.4 and earlier versions for Windows, Macintosh and UNIX. The vulnerability is also present in Adobe Acrobat 9.3.4 and earlier versions for Windows and Macintosh.
The vulnerability (CVE-2010-2883) could allow an attacker to take control of the affected system. There are reports that this vulnerability is being actively exploited in the wild.
Users are advised to take extra precautions in opening Adobe PDF files. As attacks exploiting this vulnerability are likely to get by anti-virus and anti-malware defenses, users should consider installing advanced intrusion-prevention technology capable of blocking 0-day attacks.