CVE-2011-2519
Published: 27 December 2013
Xen in the Linux kernel, when running a guest on a host without hardware assisted paging (HAP), allows guest users to cause a denial of service (invalid pointer dereference and hypervisor crash) via the SAHF instruction.
From the Ubuntu Security Team
A flaw was found in the way the Linux kernel's Xen hypervisor implementation emulated the SAHF instruction. When using a fully-virtualized guest on a host that does not use hardware assisted paging (HAP), such as those running CPUs that do not have support for (or those that have it disabled) Intel Extended Page Tables (EPT) or AMD Virtualization (AMD-V) Rapid Virtualization Indexing (RVI), a privileged guest user could trigger this flaw to cause the hypervisor to crash.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
xen Launchpad, Ubuntu, Debian |
hardy |
Does not exist
|
| lucid |
Does not exist
|
|
| maverick |
Does not exist
|
|
| natty |
Does not exist
|
|
| oneiric |
Not vulnerable
(4.1.1-2ubuntu4.3)
|
|
| precise |
Not vulnerable
(4.1.2-2ubuntu2.3)
|
|
| quantal |
Not vulnerable
(4.1.3-3ubuntu1.1)
|
|
| upstream |
Needs triage
|
|
|
Patches: upstream: http://xenbits.xen.org/hg/xen-3.1-testing.hg/rev/15644 |
||
| Binaries built from this source package are in Universe and so are supported by the community. | ||
|
xen-3.1 Launchpad, Ubuntu, Debian |
hardy |
Ignored
(reached end-of-life)
|
| lucid |
Does not exist
|
|
| maverick |
Does not exist
|
|
| natty |
Does not exist
|
|
| oneiric |
Does not exist
|
|
| precise |
Does not exist
|
|
| quantal |
Does not exist
|
|
| upstream |
Needs triage
|
|
| Binaries built from this source package are in Universe and so are supported by the community. | ||
|
xen-3.2 Launchpad, Ubuntu, Debian |
hardy |
Ignored
(reached end-of-life)
|
| lucid |
Does not exist
|
|
| maverick |
Does not exist
|
|
| natty |
Does not exist
|
|
| oneiric |
Does not exist
|
|
| precise |
Does not exist
|
|
| quantal |
Does not exist
|
|
| upstream |
Needs triage
|
|
| Binaries built from this source package are in Universe and so are supported by the community. | ||
|
xen-3.3 Launchpad, Ubuntu, Debian |
hardy |
Does not exist
|
| lucid |
Not vulnerable
(3.3.0-1ubuntu11)
|
|
| maverick |
Ignored
(reached end-of-life)
|
|
| natty |
Ignored
(reached end-of-life)
|
|
| oneiric |
Does not exist
|
|
| precise |
Does not exist
|
|
| quantal |
Does not exist
|
|
| upstream |
Needs triage
|
|
| Binaries built from this source package are in Universe and so are supported by the community. | ||