[Secure-testing-team] Bug#853006: qemu: CVE-2016-9602: 9p: virtfs allows guest to access host filesystem

[Salvatore Bonaccorso]

Source: qemu
Version: 1:2.8+dfsg-1
Severity: grave
Tags: security upstream

Hi,

the following vulnerability was published for qemu.

Rationale: I'm raising the issue for now as grave severity, since 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. But note as well, that the original proposed
patch is not fixing the issue, so upstream is still working on a
fix[1].

CVE-2016-9602[0]:
9p: virtfs allows guest to access host filesystem

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2016-9602
[1] http://www.openwall.com/lists/oss-security/2017/01/17/14
[2] https://bugzilla.redhat.com/show_bug.cgi?id=1413929

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore