ELA-46-1 libxml2 security update

several fixes for NULL pointer dereference and LZMA memory handling

Related CVE CVE-2018-14404 CVE-2018-14567 CVE-2018-9251 CVE-2017-18258

CVE-2018-14404 Fix of a NULL pointer dereference which might result in a crash and thus in a denial of service.

CVE-2018-14567 and CVE-2018-9251 Approvement in LZMA error handling which prevents an infinite loop.

CVE-2017-18258 Limit available memory to 100MB to avoid exhaustive memory consumption by malicious files.

For Debian 7 Wheezy, these problems have been fixed in version 2.8.0+dfsg1-7+wheezy13.

We recommend that you upgrade your libxml2 packages.

Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/