Bug 1843764 (CVE-2020-13791) - CVE-2020-13791 QEMU: ati-vga: OOB access while reading PCI configuration may lead to DoS
Summary: CVE-2020-13791 QEMU: ati-vga: OOB access while reading PCI configuration may ...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-13791
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: 1843765 1910690
Blocks: 1772801
TreeView+ depends on / blocked
 
Reported: 2020-06-04 04:51 UTC by Prasad Pandit
Modified: 2022-04-17 20:56 UTC (History)
30 users (show)

Fixed In Version: QEMU 5.0.1
Doc Type: If docs needed, set a value
Doc Text:
An out-of-bounds access flaw was found in the ati-vga emulator of the QEMU. The issue occurs while reading PCI configuration bytes via the ati_mm_read routine if the address sent by a guest is towards an end of the PCI configuration space. This flaw allows a guest user or process to crash the QEMU process resulting in a denial of service.
Clone Of:
Environment:
Last Closed: 2020-06-04 05:20:32 UTC
Embargoed:

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Description Prasad Pandit 2020-06-04 04:51:41 UTC 
An out-of-bounds access issue was found in the ati-vga emulator of the QEMU. It could occur while reading PCI configuration bytes via ati_mm_read routine, if the address sent by a guest is towards an end of the PCI configuration space. A guest user/process may use this flaw to crash the QEMU process resulting in DoS scenario.

Upstream patch
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg00979.html
Comment 1 Prasad Pandit 2020-06-04 04:51:48 UTC 
Acknowledgments:

Name: Ren Ding (SSLab Georgia Tech), Hanqing Zhao (SSLab Georgia Tech), Yi Ren
Comment 2 Prasad Pandit 2020-06-04 04:52:49 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1843765]
Comment 3 Product Security DevOps Team 2020-06-04 05:20:32 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-13791
Comment 5 Prasad Pandit 2020-06-04 06:27:05 UTC 
External References:

https://www.openwall.com/lists/oss-security/2020/06/04/1
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