CVE-2017-7471

NameCVE-2017-7471
DescriptionQuick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1035-1
Debian Bugs860785

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)jessie (security), jessie1:2.1+dfsg-12+deb8u6fixed
stretch (security), stretch1:2.8+dfsg-6+deb9u4fixed
buster, sid1:2.12+dfsg-3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusource(unstable)1:2.8+dfsg-5860785
qemusourcejessie(not affected)
qemusourcewheezy1.1.2+dfsg-6+deb7u22DLA-1035-1
qemu-kvmsource(unstable)(not affected)

Notes

[jessie] - qemu <not-affected> (Vulnerable code introduced with fix for CVE-2016-9602)
[wheezy] - qemu <not-affected> (Vulnerable code introduced with fix for CVE-2016-9602)
- qemu-kvm <not-affected> (Vulnerable code introduced with fix for CVE-2016-9602)
Fixed by: http://git.qemu-project.org/?p=qemu.git;a=commitdiff;h=9c6b899f7a46893ab3b671e341a2234e9c0c060e
Fixed by (stable-2.8): http://git.qemu-project.org/?p=qemu.git;a=commitdiff;h=96bae145e27d4df62671b4eebd6c735f412016cf (v2.8.1.1)
https://bugzilla.redhat.com/show_bug.cgi?id=1443401
Introduced by: http://git.qemu-project.org/?p=qemu.git;a=commitdiff;h=acf22d2264a131ad2695b5a18746dabf0cc8b843
which is part of the fix for CVE-2016-9602.

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