Debian Security Advisory

DLA-1781-1 qemu -- LTS security update

Date Reported:

09 May 2019

Affected Packages:

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 901017, Bug 912535.
In Mitre's CVE dictionary: CVE-2018-11806, CVE-2018-18849, CVE-2018-20815, CVE-2019-9824.

More information:

Several vulnerabilities were found in QEMU, a fast processor emulator:

CVE-2018-11806
It was found that the SLiRP networking implementation could use a wrong size when reallocating its buffers, which can be exploited by a priviledged user on a guest to cause denial of service or possibly arbitrary code execution on the host system.
CVE-2018-18849
It was found that the LSI53C895A SCSI Host Bus Adapter emulation was susceptible to an out of bounds memory access, which could be leveraged by a malicious guest user to crash the QEMU process.
CVE-2018-20815
A heap buffer overflow was found in the load_device_tree function, which could be used by a malicious user to potentially execute arbitrary code with the priviledges of the QEMU process.
CVE-2019-9824
William Bowling discovered that the SLiRP networking implementation did not handle some messages properly, which could be triggered to leak memory via crafted messages.

For Debian 8 Jessie, these problems have been fixed in version 1:2.1+dfsg-12+deb8u11.

We recommend that you upgrade your qemu packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS