oss-sec mailing list archives
Re: Xen Security Advisory 92 - HVMOP_set_mem_type allows invalid P2M entries to be created
From: cve-assign () mitre org
Date: Wed, 30 Apr 2014 16:18:45 -0400 (EDT)
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XSA-92
attempts to exclude transitioning a page from an inappropriate memory type. However, only an inadequate subset of memory types is excluded. ... page table translation can be inappropriately changed ... If this occurs, an invalid translation will be established. In the more general case, in more abstract terms: a malicious administrator of a domain privileged with regard to an HVM guest can cause Xen to crash the extra isolation does not provide as good a defence (against denial of service) as intended. That is the essence of this vulnerability.
Use CVE-2014-3124.
the chroot technique as found in some versions of XCP/XenServer
Our expectation is that the specific version set for these XCP and XenServer versions does not mean that there are different attacks possible (e.g., with different "inappropriate memory types") against different affected versions. - -- CVE assignment team, MITRE CVE Numbering Authority M/S M300 202 Burlington Road, Bedford, MA 01730 USA [ PGP key available through http://cve.mitre.org/cve/request_id.html ] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (SunOS) iQEcBAEBAgAGBQJTYVosAAoJEKllVAevmvmsDOcIAMcUfaX0Uo31VFN5VlLrlhLl eonm4ci4VGIW4PSvxiaAmqJvZn7Ab7nvhRRGhoFkKOsSYVepbA28gZ7wVkBn04cZ Jx5zN3Zaia6zuMy/UFO3HjzR25k8yWm9KlzBrY4P5ynP6TnYbzoM8IpQd3FMyjxb 2TlB4WTI28ilcLK0jTSpxsOUyIsRNeKQicUFMKJNVv+l/sRKLVStYbMlWJ+h6i5x 5jpjIcCrd03oyEfzH1E81aHx1zsGkRTl4WXqUjyWYKkV02c5j/j+Dvn/Axody7Ri QjE1cNQfG/gkwKSq/b7I4H/0wFnVMM7BBuvcXYJkYU2i6IhZ1R3iZVYrNZzKcKY= =CjnC -----END PGP SIGNATURE-----
Current thread:
- Xen Security Advisory 92 - HVMOP_set_mem_type allows invalid P2M entries to be created Xen . org security team (Apr 29)
- Re: Xen Security Advisory 92 - HVMOP_set_mem_type allows invalid P2M entries to be created cve-assign (Apr 30)