Bug 1853154 (CVE-2020-15469) - CVE-2020-15469 QEMU: MMIO ops null pointer dereference may lead to DoS
Summary: CVE-2020-15469 QEMU: MMIO ops null pointer dereference may lead to DoS
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2020-15469
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1853156 1853157 1853173 1853175 1853176 1853177 1853178 1853183 1853184 1910685
Blocks: 1727030
TreeView+ depends on / blocked
 
Reported: 2020-07-02 05:36 UTC by Prasad J Pandit
Modified: 2022-04-17 20:57 UTC (History)
29 users (show)

Fixed In Version: QEMU 5.0.1
Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer dereference flaw was found in various system emulators of QEMU that occurs while performing MMIO r/w operations when the respective handler function is not defined. This flaw allows a privileged guest user to invoke the MMIO operation to crash the QEMU process on the host, resulting in a denial of service.
Clone Of:
Environment:
Last Closed: 2021-12-15 12:04:30 UTC


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Description Prasad J Pandit 2020-07-02 05:36:17 UTC
A NULL pointer dereference issue was found in various system emulators of QEMU. It could occur while performing MMIO r/w operations, in case the respective handler function is not defined. A privileged guest user able to invoke MMIO operation may use this flaw to crash the QEMU process on the host resulting in DoS scenario.

Upstream patch(es):
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  -> https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg09961.html

Reference:
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  -> https://www.openwall.com/lists/oss-security/2020/07/02/1

Comment 1 Prasad J Pandit 2020-07-02 05:36:23 UTC
Acknowledgments:

Name: Lei Sun

Comment 2 Prasad J Pandit 2020-07-02 05:36:54 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1853156]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1853157]

Comment 6 Nick Tait 2021-03-02 20:16:51 UTC
Statement:

In Red Hat OpenStack Platform, because the flaw has a lower impact and the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP qemu-kvm-rhev package.


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