Bug 1218611 (CVE-2015-3456, VENOM, xsa133) - CVE-2015-3456 qemu: fdc: out-of-bounds fifo buffer memory access
Summary: CVE-2015-3456 qemu: fdc: out-of-bounds fifo buffer memory access
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2015-3456, VENOM, xsa133
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1219266 1219267 1219268 1219269 1219270 1219271 1219272 1219333 1219625 1219626 1219854 1219855 1219856 1219858 1219960 1219962 1219969 1220010 1221152 1221153 1222041 1222181 1223300
Blocks: 1218612
TreeView+ depends on / blocked
 
Reported: 2015-05-05 11:56 UTC by Martin Prpič
Modified: 2023-05-12 08:32 UTC (History)
61 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
An out-of-bounds memory access flaw was found in the way QEMU's virtual Floppy Disk Controller (FDC) handled FIFO buffer access while processing certain FDC commands. A privileged guest user could use this flaw to crash the guest or, potentially, execute arbitrary code on the host with the privileges of the host's QEMU process corresponding to the guest.
Clone Of:
Environment:
Last Closed: 2015-05-27 13:34:15 UTC
Embargoed:

Attachments (Terms of Use)
A proposed upstream patch. (2.67 KB, patch)
2015-05-07 05:31 UTC, Prasad Pandit 		no flags Details | Diff
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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:0998 0 normal SHIPPED_LIVE Important: qemu-kvm security update 2015-05-13 14:55:59 UTC
Red Hat Product Errata RHSA-2015:0999 0 normal SHIPPED_LIVE Important: qemu-kvm security update 2015-05-13 17:36:20 UTC
Red Hat Product Errata RHSA-2015:1000 0 normal SHIPPED_LIVE Important: qemu-kvm-rhev security update 2015-05-13 15:24:42 UTC
Red Hat Product Errata RHSA-2015:1001 0 normal SHIPPED_LIVE Important: qemu-kvm-rhev security update 2015-05-13 15:24:17 UTC
Red Hat Product Errata RHSA-2015:1002 0 normal SHIPPED_LIVE Important: xen security update 2015-05-13 15:22:45 UTC
Red Hat Product Errata RHSA-2015:1003 0 normal SHIPPED_LIVE Important: kvm security update 2015-05-13 15:22:15 UTC
Red Hat Product Errata RHSA-2015:1004 0 normal SHIPPED_LIVE Important: qemu-kvm-rhev security update 2015-05-13 15:18:30 UTC
Red Hat Product Errata RHSA-2015:1011 0 normal SHIPPED_LIVE Important: rhev-hypervisor security update 2015-05-15 23:38:54 UTC
Red Hat Product Errata RHSA-2015:1031 0 normal SHIPPED_LIVE Important: qemu-kvm security update 2015-05-27 15:46:22 UTC

Description Martin Prpič 2015-05-05 11:56:03 UTC 
An out-of-bounds memory access flaw was found in the way QEMU's virtual Floppy Disk Controller (FDC) handled FIFO buffer access while processing certain FDC commands. A privileged guest user could use this flaw to crash the guest or, potentially, execute arbitrary code on the host with the privileges of the hosting QEMU process.

Acknowledgements:

Red Hat would like to thank Jason Geffner of CrowdStrike for reporting this issue.
Comment 1 Prasad Pandit 2015-05-06 21:22:59 UTC 
Statement: 

This issue affects the versions of the kvm and xen packages as shipped with Red Hat Enterprise Linux 5, the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6 and 7, and the versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3. Future updates for the respective releases will address this flaw.
Comment 13 Petr Matousek 2015-05-13 10:29:42 UTC 
External references:

https://access.redhat.com/articles/1444903
https://securityblog.redhat.com/2015/05/13/venom-dont-get-bitten/
http://venom.crowdstrike.com/
http://xenbits.xen.org/xsa/advisory-133.html
Comment 14 errata-xmlrpc 2015-05-13 10:56:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2015:0998 https://rhn.redhat.com/errata/RHSA-2015-0998.html
Comment 15 errata-xmlrpc 2015-05-13 11:20:52 UTC 
This issue has been addressed in the following products:

  OpenStack 5 for RHEL 6
  OpenStack 4 for RHEL 6
  OpenStack 5 for RHEL 7
  OpenStack 6 for RHEL 7

Via RHSA-2015:1004 https://rhn.redhat.com/errata/RHSA-2015-1004.html
Comment 17 errata-xmlrpc 2015-05-13 11:22:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5

Via RHSA-2015:1003 https://rhn.redhat.com/errata/RHSA-2015-1003.html
Comment 18 errata-xmlrpc 2015-05-13 11:22:57 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5

Via RHSA-2015:1002 https://rhn.redhat.com/errata/RHSA-2015-1002.html
Comment 19 errata-xmlrpc 2015-05-13 11:24:28 UTC 
This issue has been addressed in the following products:

  RHEV-H and Agents for RHEL-6

Via RHSA-2015:1001 https://rhn.redhat.com/errata/RHSA-2015-1001.html
Comment 20 errata-xmlrpc 2015-05-13 11:24:51 UTC 
This issue has been addressed in the following products:

  RHEV-H and Agents for RHEL-7

Via RHSA-2015:1000 https://rhn.redhat.com/errata/RHSA-2015-1000.html
Comment 22 Petr Matousek 2015-05-13 11:47:29 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1221153]
Comment 23 Petr Matousek 2015-05-13 11:47:36 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1221152]
Comment 24 Petr Matousek 2015-05-13 12:44:15 UTC 
Upstream patch:

http://git.qemu.org/?p=qemu.git;a=commit;h=e907746266721f305d67bc0718795fedee2e824c
Comment 25 errata-xmlrpc 2015-05-13 13:36:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:0999 https://rhn.redhat.com/errata/RHSA-2015-0999.html
Comment 26 Jan ONDREJ 2015-05-13 19:10:31 UTC 
I think this affects qemu-2.0.0 from EPEL7 too (not only qemu-1.5 from EL7 base).
I have no access to all depending bugs, so sorry if I missed something.
Comment 27 Petr Matousek 2015-05-15 14:44:15 UTC 
Created qemu tracking bugs for this issue:

Affects: epel-7 [bug 1222041]
Comment 28 Petr Matousek 2015-05-15 14:45:17 UTC 
(In reply to Jan ONDREJ from comment #26)
> I think this affects qemu-2.0.0 from EPEL7 too (not only qemu-1.5 from EL7
> base).

Correct. It's added now, please see bug 1222041 .
Comment 29 errata-xmlrpc 2015-05-15 19:39:03 UTC 
This issue has been addressed in the following products:

  RHEV-H and Agents for RHEL-7
  RHEV-H and Agents for RHEL-6

Via RHSA-2015:1011 https://rhn.redhat.com/errata/RHSA-2015-1011.html
Comment 30 Fedora Update System 2015-05-17 06:38:00 UTC 
qemu-2.1.3-7.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 32 Fedora Update System 2015-05-22 17:55:14 UTC 
qemu-1.6.2-14.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 33 Fedora Update System 2015-05-26 03:21:12 UTC 
xen-4.4.2-4.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 34 Fedora Update System 2015-05-26 03:34:26 UTC 
xen-4.3.4-4.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 35 Fedora Update System 2015-05-26 03:41:10 UTC 
qemu-2.3.0-4.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 36 Fedora Update System 2015-05-26 03:43:32 UTC 
xen-4.5.0-9.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 37 errata-xmlrpc 2015-05-27 11:46:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.5 EUS - Server and Compute Node Only

Via RHSA-2015:1031 https://rhn.redhat.com/errata/RHSA-2015-1031.html
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