Bug 1341931 - (CVE-2016-5238) CVE-2016-5238 Qemu: scsi: esp: OOB write when using non-DMA mode in get_cmd
CVE-2016-5238 Qemu: scsi: esp: OOB write when using non-DMA mode in get_cmd
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20160531,repor...
: Security
Depends On: 1341932
Blocks: 1326310
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Reported: 2016-06-02 01:21 EDT by Prasad J Pandit
Modified: 2016-07-02 15:30 EDT (History)
36 users (show)

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Description Prasad J Pandit 2016-06-02 01:21:58 EDT
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 information transfer. The OOB write occurs while
reading from information transfer buffer via non-DMA mode in routine get_cmd().

A privileged user inside guest could use this flaw to crash the Qemu process
resulting in DoS.

Upstream patch:
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  -> https://lists.gnu.org/archive/html/qemu-devel/2016-06/msg00150.html

Reference:
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  -> http://www.openwall.com/lists/oss-security/2016/06/02/9
Comment 1 Prasad J Pandit 2016-06-02 01:22:26 EDT
Acknowledgments:

Name: Li Qiang (360.cn Inc.)
Comment 2 Prasad J Pandit 2016-06-02 01:24:11 EDT
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1341932]
Comment 3 Fedora Update System 2016-06-17 11:57:05 EDT
xen-4.5.3-8.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
Comment 4 Fedora Update System 2016-06-18 14:43:44 EDT
xen-4.6.1-11.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 2016-06-25 15:25:51 EDT
qemu-2.6.0-4.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Comment 6 Fedora Update System 2016-07-02 15:25:06 EDT
qemu-2.3.1-16.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 7 Fedora Update System 2016-07-02 15:30:23 EDT
qemu-2.4.1-11.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

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