The update of jasper issued as ELA-72-1 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 7 Wheezy, these problems have been fixed in version 1.900.1-13+deb7u9.
We recommend that you upgrade your jasper packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/