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Vulnerability of QEMU: out-of-bounds memory reading via iscsi_aio_ioctl_cb

Synthesis of the vulnerability 

An attacker, inside a guest system, can force a read at an invalid address via iscsi_aio_ioctl_cb() of QEMU, in order to trigger a denial of service, or to obtain sensitive information on the host system.
Vulnerable software: openSUSE Leap, QEMU, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this announce: 2/4.
Creation date: 13/01/2021.
Références of this computer vulnerability: CVE-2020-11947, openSUSE-SU-2021:0363-1, SUSE-SU-2021:0521-1, SUSE-SU-2021:1240-1, SUSE-SU-2021:1241-1, SUSE-SU-2021:1242-1, SUSE-SU-2021:1244-1, SUSE-SU-2021:1245-1, SUSE-SU-2021:1305-1, USN-4725-1, VIGILANCE-VUL-34309.

Description of the vulnerability 

An attacker, inside a guest system, can force a read at an invalid address via iscsi_aio_ioctl_cb() of QEMU, in order to trigger a denial of service, or to obtain sensitive information on the host system.
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This computer weakness note impacts software or systems such as openSUSE Leap, QEMU, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this security bulletin is medium.

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 weakness announce.

Solutions for this threat 

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

openSUSE Leap 15.2: new qemu packages.
New packages are available:
  openSUSE Leap 15.2: qemu 4.2.1-lp152.9.9.2

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 4.2.1-11.13.1

Ubuntu: new qemu packages.
New packages are available:
  Ubuntu 20.10: qemu 1:5.0-5ubuntu9.4
  Ubuntu 20.04 LTS: qemu 1:4.2-3ubuntu6.12
  Ubuntu 18.04 LTS: qemu 1:2.11+dfsg-1ubuntu7.35
  Ubuntu 16.04 LTS: qemu 1:2.5+dfsg-5ubuntu10.49
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