Debian DLA-1927-1 : qemu security update
Medium Nessus Plugin ID 129105
SynopsisThe remote Debian host is missing a security update.
DescriptionSeveral vulnerabilities were found in QEMU, a fast processor emulator (notably used in KVM and Xen HVM virtualization).
Heap-based buffer overflow in the iscsi_aio_ioctl function in block/iscsi.c in QEMU allows local guest OS users to cause a denial of service (QEMU process crash) or possibly execute arbitrary code via a crafted iSCSI asynchronous I/O ioctl call.
The virtqueue_pop function in hw/virtio/virtio.c in QEMU allows local guest OS administrators to cause a denial of service (memory consumption and QEMU process crash) by submitting requests without waiting for completion.
QEMU, when built with USB xHCI controller emulator support, allows local guest OS privileged users to cause a denial of service (infinite recursive call) via vectors involving control transfer descriptors sequencing.
QEMU scsi disk backend: lsi: exit infinite loop while executing script
interface_release_resource in hw/display/qxl.c in QEMU has a NULL pointer dereference.
qemu-bridge-helper.c in QEMU does not ensure that a network interface name (obtained from bridge.conf or a --br=bridge option) is limited to the IFNAMSIZ size, which can lead to an ACL bypass.
ip_reass in ip_input.c in libslirp 4.0.0 has a heap-based buffer overflow via a large packet because it mishandles a case involving the first fragment.
libslirp 4.0.0, as used in QEMU, has a use-after-free in ip_reass in ip_input.c.
For Debian 8 'Jessie', these problems have been fixed in version 1:2.1+dfsg-12+deb8u12.
We recommend that you upgrade your qemu packages.
NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpgrade the affected packages.