Bug 1910346 (CVE-2020-35503) - CVE-2020-35503 QEMU: NULL pointer dereference issue in megasas-gen2 host bus adapter
Summary: CVE-2020-35503 QEMU: NULL pointer dereference issue in megasas-gen2 host bus ...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-35503
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: 1910366 1910367
Blocks: 1907553
TreeView+ depends on / blocked
 
Reported: 2020-12-23 14:32 UTC by Mauro Matteo Cascella
Modified: 2021-02-22 18:46 UTC (History)
28 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Clone Of:
Environment:
Last Closed: 2020-12-23 18:27:36 UTC


Attachments (Terms of Use)

Description Mauro Matteo Cascella 2020-12-23 14:32:23 UTC
A NULL pointer dereference issue was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU. It could occur in the megasas_command_cancelled() callback function in hw/scsi/megasas.c while dropping a SCSI request. A privileged guest user may exploit this issue to crash the QEMU process on the host, resulting in a denial of service condition.

Comment 1 Mauro Matteo Cascella 2020-12-23 14:32:29 UTC
Acknowledgments:

Name: Cheolwoo Myung

Comment 2 Mauro Matteo Cascella 2020-12-23 15:42:40 UTC
Statement:

This issue does not affect Red Hat Enterprise Linux, Red Hat OpenStack Platform and RHEL Advanced Virtualization, as the `qemu-kvm` package does not include support for the megasas-gen2 host bus adapter emulation.

Comment 3 Mauro Matteo Cascella 2020-12-23 15:43:06 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1910366]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1910367]


Note You need to log in before you can comment on or make changes to this bug.