Debian LTS: DLA-2373-1: qemu security update
Summary
CVE-2020-1711
An out-of-bounds heap buffer access flaw was found in the way the iSCSI
Block driver in QEMU handled a response coming from an iSCSI server
while checking the status of a Logical Address Block (LBA) in an
iscsi_co_block_status() routine. A remote user could use this flaw to
crash the QEMU process, resulting in a denial of service or potential
execution of arbitrary code with privileges of the QEMU process on the
host.
CVE-2020-13253
An out-of-bounds read access issue was found in the SD Memory Card
emulator of the QEMU. It occurs while performing block write commands
via sdhci_write(), if a guest user has sent 'address' which is OOB of
's->wp_groups'. A guest user/process may use this flaw to crash the
QEMU process resulting in DoS.
CVE-2020-14364
An out-of-bounds read/write access issue was found in the USB emulator
of the QEMU. It occurs while processing USB packets from a guest, when
'USBDevice->setup_len' exceeds the USBDevice->data_buf[4096], in
do_token_{in,out} routines.
CVE-2020-16092
An assertion failure can occur in the network packet processing. This
issue affects the e1000e and vmxnet3 network devices. A malicious guest
user/process could use this flaw to abort the QEMU process on the host,
resulting in a denial of service condition in
net_tx_pkt_add_raw_fragment in hw/net/net_tx_pkt.c
For Debian 9 stretch, these problems have been fixed in version
1:2.8+dfsg-6+deb9u11.
We recommend that you upgrade your qemu packages.
For the detailed security status of qemu please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/qemu
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
