Posted by Apple Product Security on Mar 27

APPLE-SA-2017-03-27-1 Pages 6.1, Numbers 4.1, and Keynote 7.1
for Mac; Pages 3.1, Numbers 3.1, and Keynote 3.1 for iOS are now
available and address the following:

Export
Available for: macOS 10.12 Sierra or later, iOS 10 or later
Impact: The contents of password-protected PDFs exported from iWork
may be exposed
Description: iWork used weak 40-bit RC4 encryption for password-
protected PDF exports. This issue was addressed by changing iWork…