Bug 1337502 (CVE-2016-4439) - CVE-2016-4439 Qemu: scsi: esp: OOB write while writing to 's->cmdbuf' in esp_reg_write
Summary: CVE-2016-4439 Qemu: scsi: esp: OOB write while writing to 's->cmdbuf' in esp_...
Status: CLOSED NOTABUG
Alias: CVE-2016-4439
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=moderate,public=20160519,repor...
Keywords: Security
Depends On: 1337503
Blocks: 1337125
TreeView+ depends on / blocked
 
Reported: 2016-05-19 10:58 UTC by Prasad J Pandit
Modified: 2019-06-08 21:12 UTC (History)
34 users (show)

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Clone Of:
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Last Closed: 2019-06-08 02:52:04 UTC


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Description Prasad J Pandit 2016-05-19 10:58:48 UTC
Quick Emulator(Qemu) built with the ESP/NCR53C9x controller emulation support
is vulnerable to an OOB write access issue. The controller uses 16-byte FIFO
buffer for command and data transfer. The OOB write occurs while writing to
this command buffer in esp_reg_write().

A privileged user inside guest could use this flaw to crash the Qemu process
resulting in DoS OR potentially leverage it to execute arbitrary code with
privileges of the Qemu process on the host.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg03273.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/05/19/3

Comment 1 Prasad J Pandit 2016-05-19 10:59:20 UTC
Acknowledgments:

Name: Li Qiang (360.cn Inc.)

Comment 2 Prasad J Pandit 2016-05-19 11:00:15 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1337503]

Comment 3 Fedora Update System 2016-05-29 17:47:24 UTC
qemu-2.6.0-3.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2016-05-30 21:18:59 UTC
xen-4.6.1-10.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2016-05-31 02:51:26 UTC
qemu-2.4.1-10.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2016-06-05 02:55:37 UTC
xen-4.5.3-6.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2016-06-07 01:19:39 UTC
qemu-2.3.1-15.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2016-06-12 22:50:59 UTC
xen-4.5.3-6.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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