Description
Multiple use-after-free vulnerabilities in vnc.c in the VNC server in QEMU 0.10.6 and earlier might allow guest OS users to execute arbitrary code on the host OS by establishing a connection from a VNC client and then (1) disconnecting during data transfer, (2) sending a message using incorrect integer data types, or (3) using the Fuzzy Screen Mode protocol, related to double free vulnerabilities.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | qemu | 0.11.0-1 | — |
| Debian 13 | qemu | 0.11.0-1 | — |
| Debian 12 | qemu | 0.11.0-1 | — |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=501131
- http://git.savannah.gnu.org/cgit/qemu.git/commit/?id=753b405331
- [oss-security] 20091016 Re: QEMU VNC use-after-free mailing-list
- http://git.savannah.gnu.org/cgit/qemu.git/commit/?id=198a0039c5
- [qemu-devel] 20090525 Re: [STABLE] [BUG] VNC mode can crash QEMU mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=508567
- 36716 vdb-entry
- http://rhn.redhat.com/errata/RHEA-2009-1272.html
- [oss-security] 20091016 QEMU VNC use-after-free mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=505641