acroread -- insecure temporary file creation

Secunia Research reports:

Secunia has discovered a security issue in Adobe Reader
for Linux, which can be exploited by malicious, local
users to gain knowledge of sensitive information.
The problem is caused due to temporary files being
created with permissions based on a user’s umask in the
“/tmp” folder under certain circumstances when documents
are opened.
Successful exploitation allows an unprivileged user to
read arbitrary users’ documents.