[SECURITY] [DLA 1646-1] qemu security update

Package : qemu
Version : 1:2.1+dfsg-12+deb8u9
CVE ID : CVE-2018-17958 CVE-2018-19364 CVE-2018-19489

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

CVE-2018-17958

The rtl8139 emulator is affected by an integer overflow and subsequent
buffer overflow. This vulnerability might be triggered by remote
attackers with crafted packets to perform denial of service (via OOB
stack buffer access).

CVE-2018-19364

The 9pfs subsystem is affected by a race condition allowing threads to
modify an fid path while it is being accessed by another thread,
leading to (for example) a use-after-free outcome. This vulnerability
might be triggered by local attackers to perform denial of service.

CVE-2018-19489

The 9pfs subsystem is affected by a race condition during file
renaming. This vulnerability might be triggered by local attackers to
perform denial of service.

For Debian 8 "Jessie", these problems have been fixed in version
1:2.1+dfsg-12+deb8u9.

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