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Bug 1270871 (CVE-2015-8744) - CVE-2015-8744 Qemu: net: vmxnet3: incorrect l2 header validation leads to a crash via assert(2) call
Summary: CVE-2015-8744 Qemu: net: vmxnet3: incorrect l2 header validation leads to a c...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2015-8744
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1295440 1295441
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-10-12 14:54 UTC by Adam Mariš
Modified: 2021-02-17 04:51 UTC (History)
29 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2019-06-08 02:44:01 UTC
Embargoed:


Attachments (Terms of Use)
Patch (deleted)
2015-10-12 14:57 UTC, Adam Mariš
no flags Details | Diff

Description Adam Mariš 2015-10-12 14:54:16 UTC
Qemu emulator built with a VMWARE VMXNET3 paravirtual NIC emulator support is
vulnerable to crash issue. It occurs when a guest sends a Layer-2 packets smaller than 22 bytes.

A privileged(CAP_SYS_RAWIO) guest user could use this flaw to crash the Qemu process instance resulting in DoS.

Upstream patch:
---------------
  -> http://git.qemu.org/?p=qemu.git;a=commitdiff;h=a7278b36fcab9af469563bd7b

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/01/04/6

Comment 1 Adam Mariš 2015-10-12 14:57:48 UTC
Created attachment 1082030 [details]
Patch

Comment 2 Paolo Bonzini 2015-10-19 09:59:21 UTC
RHEL and RHEV QEMU is not affected because it doesn't ship the vmx device.

Comment 3 Prasad Pandit 2016-01-04 13:07:58 UTC
Statement: 

This issue does not affect the versions of the kvm and xen packages as shipped with Red Hat Enterprise Linux 5.

This issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6, and the Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.

This issue does not affect the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 7.

This issue does not affect the Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.

Comment 4 Prasad Pandit 2016-01-04 14:00:26 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1295441]

Comment 5 Prasad Pandit 2016-01-04 14:00:42 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1295440]

Comment 7 Fedora Update System 2016-01-12 07:54:32 UTC
qemu-2.4.1-5.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2016-01-19 23:54:42 UTC
qemu-2.3.1-10.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 9 Fedora Update System 2016-01-28 18:24:11 UTC
xen-4.5.2-7.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 10 Fedora Update System 2016-02-01 06:29:19 UTC
xen-4.5.2-7.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.


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