Bug 1204919 (CVE-2014-9718) - CVE-2014-9718 Qemu: PRDT overflow from guest to host
Summary: CVE-2014-9718 Qemu: PRDT overflow from guest to host
Keywords:
Status: NEW
Alias: CVE-2014-9718
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:
: 1205321 (view as bug list)
Depends On: 1205100 1205103 1205322 1216968
Blocks: 1169000
TreeView+ depends on / blocked
 
Reported: 2015-03-23 18:36 UTC by Prasad J Pandit
Modified: 2021-06-03 12:20 UTC (History)
29 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A denial of service flaw was found in the way QEMU handled malformed Physical Region Descriptor Table (PRDT) data sent to the host's IDE and/or AHCI controller emulation. A privileged guest user could use this flaw to crash the system.
Clone Of:
Environment:
Last Closed:


Attachments (Terms of Use)

Description Prasad J Pandit 2015-03-23 18:36:31 UTC
Upstream Qemu is vulnerable to sending malicious PRDT data to the host's
IDE and/or AHCI controller emulation. This could result in infinite loop or memory leakage on the host leading to unbounded resource consumption on the host.

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

Upstream fix:
-------------
  -> http://git.qemu.org/?p=qemu.git;a=commitdiff;h=3251bdcf1c67427d964517053c3d185b46e618e8

Comment 1 Prasad J Pandit 2015-03-24 08:49:45 UTC
Statement:

This issue did not affect the versions of the kvm package as shipped with Red Hat Enterprise Linux 5 and the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6.

This issue affects the version of the qemu-kvm package as shipped with Red Hat Enterprise Linux 7, a future update may address this flaw.

Comment 3 Prasad J Pandit 2015-03-24 08:54:38 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1205103]

Comment 4 Vasyl Kaigorodov 2015-03-24 17:08:11 UTC
*** Bug 1205321 has been marked as a duplicate of this bug. ***


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