A libxstream-java has been released for Debian 7 LTS
Package : libxstream-java
Version : 1.4.2-1+deb7u2
CVE ID : CVE-2017-7957
Debian Bug : #861521
It was discovered that there was a remote application crash vulnerability in
libxstream-java, a Java library to serialize objects to XML and back again.
This was due to mishandled attempts to create an instance of the primitive type
'void' during unmarshalling.
For Debian 7 "Wheezy", this issue has been fixed in libxstream-java version
1.4.2-1+deb7u2.
We recommend that you upgrade your libxstream-java packages.