Bug 1653156 (CVE-2018-19489) - CVE-2018-19489 QEMU: 9pfs: crash due to race condition in renaming files
Summary: CVE-2018-19489 QEMU: 9pfs: crash due to race condition in renaming files
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2018-19489
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: 1653157
Blocks: 1653151
TreeView+ depends on / blocked
 
Reported: 2018-11-26 05:41 UTC by Prasad Pandit
Modified: 2021-02-16 22:44 UTC (History)
34 users (show)

Fixed In Version:
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Last Closed: 2018-11-27 04:12:11 UTC
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Description Prasad Pandit 2018-11-26 05:41:29 UTC 
A use-after-free flaw was found in the VirtFS, host directory sharing via Plan 9
File System(9pfs) support in QEMU. It could occur due to a race condition while renaming
files on a shared host directory.

A user inside guest could use this flaw to crash the QEMU process resulting in DoS issue.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg04489.html

Reference:
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  -> https://www.openwall.com/lists/oss-security/2018/11/26/1
Comment 1 Prasad Pandit 2018-11-26 05:41:32 UTC 
Acknowledgments:

Name: Zhibin Hu
Comment 2 Prasad Pandit 2018-11-26 05:42:08 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1653157]
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