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Vulnerability of QEMU: assertion error via usb_packet_map

Synthesis of the vulnerability 

An attacker, inside a guest system, can force an assertion error via usb_packet_map() of QEMU, in order to trigger a denial of service on the host system.
Impacted systems: Debian, openSUSE Leap, QEMU, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 1/4.
Creation date: 30/11/2020.
Références of this alert: CVE-2020-25723, DLA-2469-1, openSUSE-SU-2021:0600-1, RHSA-2021:0771-01, SUSE-SU-2020:14557-1, SUSE-SU-2021:1240-1, SUSE-SU-2021:1241-1, SUSE-SU-2021:1242-1, SUSE-SU-2021:1243-1, SUSE-SU-2021:1244-1, SUSE-SU-2021:1245-1, SUSE-SU-2021:1305-1, SUSE-SU-2021:14704-1, SUSE-SU-2021:14706-1, USN-4650-1, VIGILANCE-VUL-33989.

Description of the vulnerability 

An attacker, inside a guest system, can force an assertion error via usb_packet_map() of QEMU, in order to trigger a denial of service on the host system.
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This security weakness impacts software or systems such as Debian, openSUSE Leap, QEMU, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this threat bulletin is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this threat.

Solutions for this threat 

QEMU: patch for usb_packet_map.
A patch is indicated in information sources.

Debian 9: new qemu packages (30/11/2020).
New packages are available:
  Debian 9: qemu 1:2.8+dfsg-6+deb9u12

openSUSE Leap 15.2: new qemu packages.
New packages are available:
  openSUSE Leap 15.2: qemu 4.2.1-lp152.9.12.1

RHEL 8.2: new virt-rhel module.
The following module is updated:
  RHEL 8.2 Module: virt:rhel

SUSE LE 11 SP3: new kvm packages.
New packages are available:
  SUSE LE 11 SP3: kvm 1.4.2-53.38.1

SUSE LE 11 SP4: new kvm packages.
New packages are available:
  SUSE LE 11 SP4: kvm 1.4.2-60.34.1

SUSE LE 11 SP4: new xen packages.
New packages are available:
  SUSE LE 11 SP4: xen 4.4.4_46-61.58.1

SUSE LE 12 SP2: new qemu packages.
New packages are available:
  SUSE LE 12 SP2: qemu 2.6.2-41.62.1

SUSE LE 12 SP3: new qemu packages.
New packages are available:
  SUSE LE 12 SP3: qemu 2.9.1-6.47.1

SUSE LE 12 SP4: new qemu packages.
New packages are available:
  SUSE LE 12 SP4: qemu 2.11.2-5.29.1

SUSE LE 12 SP5: new qemu packages.
New packages are available:
  SUSE LE 12 SP5: qemu 3.1.1.1-48.2

SUSE LE 15 RTM: new qemu packages.
New packages are available:
  SUSE LE 15 RTM: qemu 2.11.2-9.43.1

SUSE LE 15 SP1: new qemu packages.
New packages are available:
  SUSE LE 15 SP1: qemu 3.1.1.1-9.24.3

SUSE LE 15 SP2: new qemu packages.
New packages are available:
  SUSE LE 15 SP2: qemu 4.2.1-11.16.3

Ubuntu: new qemu packages.
New packages are available:
  Ubuntu 16.04 LTS: qemu 1:2.5+dfsg-5ubuntu10.48
  Ubuntu 18.04 LTS: qemu 1:2.11+dfsg-1ubuntu7.34
  Ubuntu 20.04 LTS: qemu 1:4.2-3ubuntu6.10
  Ubuntu 20.10: qemu 1:5.0-5ubuntu9.2
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