CVE-2010-4247
Published: 10 January 2011
The do_block_io_op function in (1) drivers/xen/blkback/blkback.c and (2) drivers/xen/blktap/blktap.c in Xen before 3.4.0 for the Linux kernel 2.6.18, and possibly other versions, allows guest OS users to cause a denial of service (infinite loop and CPU consumption) via a large production request index to the blkback or blktap back-end drivers. NOTE: some of these details are obtained from third party information.
From the Ubuntu Security Team
It was discovered that Xen did not correctly handle certain block requests. A local attacker in a Xen guest could cause the Xen host to use all available CPU resources, leading to a denial of service.
Notes
Author | Note |
---|---|
jdstrand | xen-3.1 has linux-2.6-xen-sparse/drivers/xen/blkback/blkback.c, but xen-3.2 and xen-3.3 do not marking dapper task as ignored since we no longer support xen userspace on Dapper anyway |
smb | My feeling is that xen-3.1 has code affected, but does not package that up. That would make only Hardy kernel code truely affected. Oneiric not-affected for now (not containing blkback) and when we move to upstream v3.0 is is fixed there. |
Priority
Status
Package | Release | Status |
---|---|---|
linux Launchpad, Ubuntu, Debian |
dapper |
Does not exist
|
hardy |
Released
(2.6.24-29.91)
|
|
karmic |
Ignored
|
|
lucid |
Not vulnerable
|
|
maverick |
Not vulnerable
|
|
natty |
Not vulnerable
|
|
upstream |
Released
|
|
Patches: other: http://xenbits.xensource.com/hg/linux-2.6.18-xen.hg/rev/77f831cbb91d other: http://xenbits.xensource.com/hg/linux-2.6.18-xen.hg/rev/7070d34f251c |
||
linux-ec2 Launchpad, Ubuntu, Debian |
dapper |
Does not exist
|
hardy |
Does not exist
|
|
karmic |
Ignored
(end of life)
|
|
lucid |
Not vulnerable
(no dom0 support)
|
|
maverick |
Ignored
(end of life)
|
|
natty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
linux-fsl-imx51 Launchpad, Ubuntu, Debian |
dapper |
Does not exist
|
hardy |
Does not exist
|
|
karmic |
Ignored
(end of life)
|
|
lucid |
Not vulnerable
|
|
maverick |
Does not exist
|
|
natty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
linux-lts-backport-maverick Launchpad, Ubuntu, Debian |
dapper |
Does not exist
|
hardy |
Does not exist
|
|
karmic |
Does not exist
|
|
lucid |
Not vulnerable
|
|
maverick |
Does not exist
|
|
natty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
linux-lts-backport-natty Launchpad, Ubuntu, Debian |
hardy |
Does not exist
|
lucid |
Not vulnerable
|
|
maverick |
Does not exist
|
|
natty |
Does not exist
|
|
upstream |
Needs triage
|
|
linux-mvl-dove Launchpad, Ubuntu, Debian |
dapper |
Does not exist
|
hardy |
Does not exist
|
|
karmic |
Ignored
(end of life)
|
|
lucid |
Not vulnerable
|
|
maverick |
Not vulnerable
|
|
natty |
Does not exist
|
|
upstream |
Not vulnerable
|
|
linux-source-2.6.15 Launchpad, Ubuntu, Debian |
dapper |
Ignored
|
hardy |
Does not exist
|
|
karmic |
Does not exist
|
|
lucid |
Does not exist
|
|
maverick |
Does not exist
|
|
natty |
Does not exist
|
|
upstream |
Ignored
|
|
linux-ti-omap4 Launchpad, Ubuntu, Debian |
dapper |
Does not exist
|
hardy |
Does not exist
|
|
karmic |
Does not exist
|
|
lucid |
Does not exist
|
|
maverick |
Not vulnerable
|
|
natty |
Not vulnerable
|
|
upstream |
Not vulnerable
|
|
xen-3.1 Launchpad, Ubuntu, Debian |
dapper |
Does not exist
|
hardy |
Not vulnerable
(not using the kernel driver part)
|
|
karmic |
Does not exist
|
|
lucid |
Does not exist
|
|
maverick |
Does not exist
|
|
natty |
Does not exist
|
|
upstream |
Needed
|