Debian: DSA-4125-1 Severe: QEMU Denial Of Service And Remote Execution

CVE-2015-3209

Matt Tait of Google's Project Zero security team discovered a flaw
in the way QEMU's AMD PCnet Ethernet emulation handles multi-TMD
packets with a length above 4096 bytes. A privileged guest user in a
guest with an AMD PCNet ethernet card enabled can potentially use
this flaw to execute arbitrary code on the host with the privileges
of the hosting QEMU process.

CVE-2015-4037

Kurt Seifried of Red Hat Product Security discovered that QEMU's
user mode networking stack uses predictable temporary file names
when the -smb option is used. An unprivileged user can use this flaw
to cause a denial of service.

CVE-2015-4103

Jan Beulich of SUSE discovered that the QEMU Xen code does not
properly restrict write access to the host MSI message data field,
allowing a malicious guest to cause a denial of service.

CVE-2015-4104

Jan Beulich of SUSE discovered that the QEMU Xen code does not
properly restrict access to PCI MSI mask bits, allowing ...