CVE-2017-7471

Name	CVE-2017-7471
Description	Quick 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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-1035-1
Debian Bugs	860785

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
qemu (PTS)	bullseye	1:5.2+dfsg-11+deb11u3	fixed
	bullseye (security)	1:5.2+dfsg-11+deb11u2	fixed
	bookworm	1:7.2+dfsg-7+deb12u7	fixed
	trixie	1:9.1.1+ds-2	fixed
	sid	1:9.1.1+ds-4	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
qemu	source	wheezy	1.1.2+dfsg-6+deb7u22	DLA-1035-1
qemu	source	jessie	(not affected)
qemu	source	(unstable)	1:2.8+dfsg-5		860785
qemu-kvm	source	(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.