Bug 1012587 (CVE-2013-4375) - CVE-2013-4375 xen: qemu disk backend (qdisk) resource leak (XSA-71)
Summary: CVE-2013-4375 xen: qemu disk backend (qdisk) resource leak (XSA-71)
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2013-4375
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:
Depends On: 1017843 1017844 1017845
Blocks: 1012558
TreeView+ depends on / blocked
 
Reported: 2013-09-26 16:52 UTC by Vincent Danen
Modified: 2019-09-29 13:08 UTC (History)
15 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-09-26 16:54:06 UTC


Attachments (Terms of Use)

Description Vincent Danen 2013-09-26 16:52:25 UTC
The qdisk PV disk backend in the qemu-xen flavour of qemu ("upstream
qemu") can be influenced by a malicious frontend to leak mapped grant
references.

A malicious HVM guest can cause the backend domain to run out of grant
references, leading to a DoS for any other domain which shares that
driver domain.


Acknowledgements:

Red Hat would like to thank the Xen project for reporting this issue.

Comment 1 Vincent Danen 2013-09-26 16:54:06 UTC
Statement:

Not vulnerable.

This issue does not affect the versions of the xen package as shipped with Red Hat Enterprise Linux 5 as it does not provide support for the qdisk PV backend.

This issue does not affect the versions of qemu-kvm as shipped with Red Hat Enterprise Linux 6 as they did not include the upstream commit that introduced this flaw.

This issue does not affect Red Hat Enterprise MRG 2.

Comment 2 Vincent Danen 2013-10-10 15:00:31 UTC
External Reference:

http://xenbits.xen.org/xsa/advisory-71.html

Comment 4 Vincent Danen 2013-10-10 15:31:48 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1017843]

Comment 5 Vincent Danen 2013-10-10 15:31:56 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1017844]

Comment 6 Fedora Update System 2013-10-23 03:34:35 UTC
xen-4.2.3-4.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2013-10-23 03:41:28 UTC
xen-4.2.3-4.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.


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