Libvirt Security Notice: LSN-2014-0008
======================================
Summary: deadlock or segfault in virConnectGetAllDomainStats
Reported on: 20141127
Published on: 20141205
Fixed on: 20141211
Reported by: Martin Kletzander <mkletzan@xxxxxxxxxx>
Patched by: Martin Kletzander <mkletzan@xxxxxxxxxx>,
Francesco Romani <fromani@xxxxxxxxxx>
See also: CVE-2014-8131
Description
-----------
When using fine-grained ACLs to restrict users from accessing all
domains, a logic bug in the qemu implementation of
virConnectGetAllDomainStats could result in incorrect lock
management of the next domain inspected after a domain that was
skipped due to ACL restrictions.
Impact
------
A restricted client can trigger a denial of service against a more
privileged user when libvirtd goes into deadlock when trying to lock
an incorrectly locked domain, or crashes when trying to unlock a
domain that was not locked.
Workaround
----------
Stop use of the fine grained access control mechanism, or stop
trying to use access control to restrict the set of domains that an
authorized client can see.
Affected product
----------------
Name: libvirt
Repository: git://libvirt.org/git/libvirt.git
http://libvirt.org/git/?p=libvirt.git
Branch: master
Broken in: v1.2.8
Broken in: v1.2.9
Broken in: v1.2.10
Fixed in: v1.2.11
Broken by: d1bde8eda3b4027b38c7c1d5942a6388b0458803
Broken by: 1f4831ee6ecc17d0f2008d7db15bfd9bc3b1d685
Fixed by: 57023c0a3af4af1c547189c1f6712ed5edeb0c0b
Fixed by: cb104ef734dfea12cb8826dba7e2c98912c4b7e1
Branch: v1.2.8-maint
Broken by: d1bde8eda3b4027b38c7c1d5942a6388b0458803
Fixed by: 27431ec96e617f186bd3f5900aeb7d622770533a
Branch: v1.2.9-maint
Broken in: v1.2.9.1
Broken by: d1bde8eda3b4027b38c7c1d5942a6388b0458803
Broken by: 1f4831ee6ecc17d0f2008d7db15bfd9bc3b1d685
Fixed by: 5d8bee6d57cddf462912ad2fc544c8a57b1c2841
Fixed by: dfbdea7ea8fa36d9f27942c5b2882acfd86a3c3b
Branch: v1.2.10-maint
Broken by: d1bde8eda3b4027b38c7c1d5942a6388b0458803
Broken by: 1f4831ee6ecc17d0f2008d7db15bfd9bc3b1d685
Fixed by: a20e818cb3f46d2dce586327dcc49ffcd82d94cb
Fixed by: a9638ae975a1c784d958e3fb2f0aab36b3ebddeb
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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