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Bug 560422 (CVE-2015-6855) - <app-emulation/qemu-2.4.1-r2: ide: divide by zero (CVE-2015-6855)
Summary: <app-emulation/qemu-2.4.1-r2: ide: divide by zero (CVE-2015-6855)
Alias: CVE-2015-6855
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B3 [glsa cve]
Depends on:
Reported: 2015-09-14 09:20 UTC by Agostino Sarubbo
Modified: 2016-02-04 09:33 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2015-09-14 09:20:23 UTC
From ${URL} :

Qemu emulator built with the IDE disk and CD/DVD-ROM emulation support is 
vulnerable to a divide by zero issue. It could occur while executing an IDE 
command WIN_READ_NATIVE_MAX to determine the maximum size of a drive.

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

Upstream fix:

The fix disables undue IDE commands for CD-ROM drives.

@maintainer(s): after the bump, in case we need to stabilize the package, please let us know if it is ready for the stabilization or not.
Comment 2 SpanKY gentoo-dev 2015-10-10 01:00:05 UTC
qemu- in the tree should have the fixes for this and should be fine to mark stable
Comment 3 Agostino Sarubbo gentoo-dev 2015-12-18 17:11:42 UTC
stabilized in another bug.

cleanup done by vapier
Comment 4 Yury German Gentoo Infrastructure gentoo-dev 2015-12-25 00:33:05 UTC
Arches and Maintainer(s), Thank you for your work.

Added to an existing GLSA Request.
Comment 5 GLSAMaker/CVETool Bot gentoo-dev 2016-02-04 09:33:52 UTC
This issue was resolved and addressed in
 GLSA 201602-01 at
by GLSA coordinator Kristian Fiskerstrand (K_F).