| Name | CVE-2016-9602 |
| Description | Qemu before version 2.9 is vulnerable to an improper link following when built with the VirtFS. 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, DLA-1497-1, DLA-965-1 |
| Debian Bugs | 853006 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| qemu (PTS) | jessie, jessie (lts) | 1:2.1+dfsg-12+deb8u23 | fixed |
| stretch (security) | 1:2.8+dfsg-6+deb9u17 | fixed |
| stretch (lts), stretch | 1:2.8+dfsg-6+deb9u19 | fixed |
| buster | 1:3.1+dfsg-8+deb10u8 | fixed |
| buster (security) | 1:3.1+dfsg-8+deb10u12 | fixed |
| bullseye | 1:5.2+dfsg-11+deb11u3 | fixed |
| bullseye (security) | 1:5.2+dfsg-11+deb11u2 | fixed |
| bookworm | 1:7.2+dfsg-7+deb12u5 | fixed |
| trixie | 1:8.2.1+ds-2 | fixed |
| sid | 1:8.2.2+ds-2 | fixed |
The information below is based on the following data on fixed versions.
Notes
https://bugzilla.redhat.com/show_bug.cgi?id=1413929
The original proposed patch does not fix the issue, cf.
https://www.openwall.com/lists/oss-security/2017/01/17/14
Upstream patchset: https://lists.gnu.org/archive/html/qemu-devel/2017-01/msg06225.html
https://bugs.chromium.org/p/project-zero/issues/detail?id=1035
If fixing this issue for older suites, then make sure not to open the
CVE-2017-7471 vulnerability and apply as well 9c6b899f7a46893ab3b671e341a2234e9c0c060e
See further details in the CVE-2017-7471 tracker entry.