Run the Adobe Updater for Acrobat 9.1.1 and Reader 9.1.1
<<From the Security Bulletin>>
Critical vulnerabilities have been identified in Adobe Reader
9.1.1 and Acrobat 9.1.1 and earlier versions. These
vulnerabilities would cause the application to crash and could
potentially allow an attacker to take control of the affected
system.
Adobe recommends users of Adobe Reader 9 and Acrobat 9 and
earlier versions update to Adobe Reader 9.1.2 and Acrobat 9.1.2.
Adobe recommends users of Acrobat 8 update to Acrobat 8.1.6, and
users of Acrobat 7 update to Acrobat 7.1.3. For Adobe Reader
users who can't update to Adobe Reader 9.1.2, Adobe has provided
the Adobe Reader 8.1.6 and Adobe Reader 7.1.3 updates. Updates
apply to Windows and Macintosh. Security updates for Adobe
Reader on the UNIX platform will be available on June 16, 2009;
the Bulletin will be updated to reflect their availability on
that date.
This update incorporates the initial output of code hardening
efforts discussed in a May 20 Adobe ASSET (Adobe Secure Software
Engineering Team) blog post, as well as externally reported
issues.