Debian Security Advisory
DSA-3348-1 qemu -- security update
- Date Reported:
- 02 Sep 2015
- Affected Packages:
- Security database references:
- In the Debian bugtracking system: Bug 793811, Bug 794610, Bug 795087, Bug 795461, Bug 796465.
In Mitre's CVE dictionary: CVE-2015-3214, CVE-2015-5154, CVE-2015-5165, CVE-2015-5225, CVE-2015-5745.
- More information:
Several vulnerabilities were discovered in qemu, a fast processor emulator.
Matt Tait of Google's Project Zero security team discovered a flaw in the QEMU i8254 PIT emulation. A privileged guest user in a guest with QEMU PIT emulation enabled could potentially use this flaw to execute arbitrary code on the host with the privileges of the hosting QEMU process.
Kevin Wolf of Red Hat discovered a heap buffer overflow flaw in the IDE subsystem in QEMU while processing certain ATAPI commands. A privileged guest user in a guest with the CDROM drive enabled could potentially use this flaw to execute arbitrary code on the host with the privileges of the hosting QEMU process.
Donghai Zhu discovered that the QEMU model of the RTL8139 network card did not sufficiently validate inputs in the C+ mode offload emulation, allowing a malicious guest to read uninitialized memory from the QEMU process's heap.
Mr Qinghao Tang from QIHU 360 Inc. and Mr Zuozhi from Alibaba Inc discovered a buffer overflow flaw in the VNC display driver leading to heap memory corruption. A privileged guest user could use this flaw to mount a denial of service (QEMU process crash), or potentially to execute arbitrary code on the host with the privileges of the hosting QEMU process.
A buffer overflow vulnerability was discovered in the way QEMU handles the virtio-serial device. A malicious guest could use this flaw to mount a denial of service (QEMU process crash).
For the stable distribution (jessie), these problems have been fixed in version 1:2.1+dfsg-12+deb8u2.
For the unstable distribution (sid), these problems have been fixed in version 1:2.4+dfsg-1a.
We recommend that you upgrade your qemu packages.