CVE-2016-1570 / XSA-167

[Philipp Hahn]

<http://xenbits.xen.org/xsa/advisory-167.html> seems to be unfixed in xen-4.1.6.1:
 PV superpage functionality missing sanity checks

[Marc Deslauriers (mdeslaur)]

This was fixed by the following update:

xen (4.1.6.1-0ubuntu0.12.04.10) precise-security; urgency=low

  * Applying Xen Security Advisories:
    - CVE-2016-2270 / XSA-154
      * x86: make get_page_from_l1e() return a proper error code
      * x86: make mod_l1_entry() return a proper error code
      * x86/mm: fix mod_l1_entry() return value when encountering r/o MMIO
        page
      * x86: enforce consistent cachability of MMIO mappings
    - CVE-2016-1570 / XSA-167
      * x86/mm: PV superpage handling lacks sanity checks
    - CVE-2016-1571 / XSA-168
      * x86/VMX: prevent INVVPID failure due to non-canonical guest address
    - CVE-2015-8615 / XSA-169
      * x86: make debug output consistent in hvm_set_callback_via
    - CVE-2016-2271 / XSA-170
      * x86/VMX: sanitize rIP before re-entering guest

 -- Stefan Bader <email address hidden> Thu, 25 Feb 2016 09:25:57 +0100