Bug 1520782 (CVE-2017-17381) - CVE-2017-17381 Qemu: virtio: divide by zero exception while updating rings
Summary: CVE-2017-17381 Qemu: virtio: divide by zero exception while updating rings
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2017-17381
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: 1520784 1520785
Blocks: 1516119
TreeView+ depends on / blocked
 
Reported: 2017-12-05 07:18 UTC by Prasad Pandit
Modified: 2021-02-17 01:10 UTC (History)
24 users (show)

Fixed In Version:
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Last Closed: 2019-06-08 03:32:41 UTC
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Description Prasad Pandit 2017-12-05 07:18:28 UTC 
Virtio Vring implementation in Quick Emulator(QEMU) is vulnerable
to an arithmetic exception issue. It could occur if a guest was
to unset vring alignment while updating Virtio rings.

A guest user/process could use this flaw to crash Qemu process
resulting in DoS.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-12/msg00166.html
Comment 2 Prasad Pandit 2017-12-05 07:20:30 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1520785]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1520784]
Comment 3 Prasad Pandit 2017-12-06 11:28:42 UTC 
Acknowledgments:

Name: Huawei IT Network Security Alpha Lab, Dengzhan Heyuandong Bijunhua and Liweichao (Huawei Inc.)
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