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Bug 1413929 - (CVE-2016-9602) CVE-2016-9602 Qemu: 9p: virtfs allows guest to access host filesystem
CVE-2016-9602 Qemu: 9p: virtfs allows guest to access host filesystem
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20170117,repo...
: Security
Depends On: 1525813 1413945
Blocks: 1403761
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Reported: 2017-01-17 05:57 EST by Prasad J Pandit
Modified: 2018-04-26 12:32 EDT (History)
2 users (show)

See Also:
Fixed In Version: qemu 2.9
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
Proposed upstream patch v1 (1.69 KB, patch)
2017-01-17 06:01 EST, Prasad J Pandit 		no flags Details | Diff
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Description Prasad J Pandit 2017-01-17 05:57:42 EST 
Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9
File System(9pfs) support, is vulnerable to an improper link following issue.
It could occur while accessing symbolic link files on a shared host directory.

A privileged user inside guest could use this flaw to access host file system
beyond the shared folder and potentially escalating their privileges on a host.

Upstream patches:
-----------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-01/msg06225.html
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-02/msg04347.html

Reference:
----------
  -> http://wiki.qemu.org/Documentation/9psetup
  -> http://www.openwall.com/lists/oss-security/2017/01/17/12
Comment 1 Prasad J Pandit 2017-01-17 05:57:50 EST 
Acknowledgments:

Name: Jann Horn (Google Project Zero)
Comment 2 Prasad J Pandit 2017-01-17 06:01 EST 
Created attachment 1241674 [details]
Proposed upstream patch v1
Comment 3 Prasad J Pandit 2017-01-17 07:12:51 EST 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1413945]
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