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

Synthesis of the vulnerability 

An attacker, inside a guest system, can force a read at an invalid address via ide_atapi_cmd_reply_end() of QEMU, in order to trigger a denial of service, or to obtain sensitive information on the host system.
Impacted systems: Debian, openSUSE Leap, QEMU, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 2/4.
Creation date: 18/01/2021.
Références of this alert: CVE-2020-29443, DLA-2560-1, openSUSE-SU-2021:0600-1, RHSA-2021:1762-01, RHSA-2021:2322-01, 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-4725-1, VIGILANCE-VUL-34361.

Description of the vulnerability 

An attacker, inside a guest system, can force a read at an invalid address via ide_atapi_cmd_reply_end() of QEMU, in order to trigger a denial of service, or to obtain sensitive information on the host system.
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This weakness announce 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 vulnerability alert 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 computer threat announce.

Solutions for this threat 

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

Debian 9: new qemu packages.
New packages are available:
  Debian 9: qemu 1:2.8+dfsg-6+deb9u13

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

RHEL 7.9: new qemu-kvm packages.
New packages are available:
  RHEL 7.9: qemu-kvm 1.5.3-175.el7_9.4

RHEL 8: new virt-rhel module.
The following module is updated:
  RHEL 8 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 12 SP2: new qemu packages (23/04/2021).
New packages are available:
  SUSE LE 12 SP2: qemu 2.6.2-41.62.1

SUSE LE 12 SP3: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 12 SP3: qemu 2.9.1-6.47.1

SUSE LE 12 SP4: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 12 SP4: qemu 2.11.2-5.29.1

SUSE LE 12 SP5: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 12 SP5: qemu 3.1.1.1-48.2

SUSE LE 15 RTM: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 15 RTM: qemu 2.11.2-9.43.1

SUSE LE 15 SP1: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 15 SP1: qemu 3.1.1.1-9.24.3

SUSE LE 15 SP2: new qemu packages (16/04/2021).
New packages are available:
  SUSE LE 15 SP2: qemu 4.2.1-11.16.3

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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