Debian LTS: DLA-2373-1: qemu security update

The following security issues have been found in qemu, which could potentially result in DoS and execution of arbitrary code. CVE-2020-1711

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Debian LTS Advisory DLA-2373-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                          Abhijith PA
September 13, 2020                            https://wiki.debian.org/LTS
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Package        : qemu
Version        : 1:2.8+dfsg-6+deb9u11
CVE ID         : CVE-2020-1711 CVE-2020-13253 CVE-2020-14364 CVE-2020-16092
Debian Bug     : 968947 961297 949731

The following security issues have been found in qemu, which could
potentially result in DoS and execution of arbitrary code.

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/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