[SECURITY] [DLA 1628-2] jasper regression update

Package : jasper
Version : 1.900.1-debian1-2.4+deb8u6

The update of jasper issued as DLA-1628-1 caused a regression due to
the fix for CVE-2018-19542, a NULL pointer dereference in the function
jp2_decode, which could lead to a denial-of-service. In some cases not
only invalid jp2 files but also valid jp2 files were rejected.

For Debian 8 "Jessie", this problem has been fixed in version
1.900.1-debian1-2.4+deb8u6.

We recommend that you upgrade your jasper packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS