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Vulnerability of QEMU: buffer overflow via tcp_emu

Synthesis of the vulnerability 

An attacker, inside a guest system, can trigger a buffer overflow via tcp_emu() of QEMU, in order to trigger a denial of service, and possibly to run code on the host system.
Impacted systems: Debian, Fedora, openSUSE Leap, QEMU, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 2/4.
Creation date: 25/01/2019.
Références of this alert: CVE-2019-6778, DLA-1694-1, DSA-4454-1, DSA-4454-2, FEDORA-2019-88a98ce795, openSUSE-SU-2019:0254-1, openSUSE-SU-2019:1074-1, openSUSE-SU-2019:1226-1, openSUSE-SU-2019:2044-1, openSUSE-SU-2020:0468-1, RHSA-2019:1883-01, RHSA-2019:2892-01, SUSE-SU-2019:0423-1, SUSE-SU-2019:0435-1, SUSE-SU-2019:0457-1, SUSE-SU-2019:0471-1, SUSE-SU-2019:0471-2, SUSE-SU-2019:0489-1, SUSE-SU-2019:0582-1, SUSE-SU-2019:0825-1, SUSE-SU-2019:0827-1, SUSE-SU-2019:0891-1, SUSE-SU-2019:0921-1, SUSE-SU-2019:13962-1, SUSE-SU-2019:14001-1, SUSE-SU-2019:14011-1, SUSE-SU-2019:2223-1, SUSE-SU-2021:14706-1, USN-3923-1, VIGILANCE-VUL-28367.

Description of the vulnerability 

An attacker, inside a guest system, can trigger a buffer overflow via tcp_emu() of QEMU, in order to trigger a denial of service, and possibly to run code on the host system.
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This computer vulnerability note impacts software or systems such as Debian, Fedora, openSUSE Leap, QEMU, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer vulnerability announce 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 cybersecurity announce.

Solutions for this threat 

QEMU: version 3.0.1.
The version 3.0.1 is fixed:
  https://www.qemu.org/download/#source

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

Debian 8: new qemu packages.
New packages are available:
  Debian 8: qemu 1:2.1+dfsg-12+deb8u10

Debian 9: new qemu packages.
New packages are available:
  Debian 9: qemu 1:2.8+dfsg-6+deb9u7

Fedora 29: new qemu packages.
New packages are available:
  Fedora 29: qemu 3.0.0-4.fc29

openSUSE Leap 15.0: new qemu packages.
New packages are available:
  openSUSE Leap 15.0: qemu 2.11.2-lp150.7.18.1

openSUSE Leap 15.1: new podman packages.
New packages are available:
  openSUSE Leap 15.1: podman 1.4.4-lp151.3.3.1

openSUSE Leap 15.1: new qemu packages.
New packages are available:
  openSUSE Leap 15.1: qemu 3.1.1.1-lp151.7.12.1

openSUSE Leap 42.3: new qemu packages (29/03/2019).
New packages are available:
  openSUSE Leap 42.3: qemu 2.9.1-56.1

openSUSE Leap 42.3: new xen packages (18/04/2019).
New packages are available:
  openSUSE Leap 42.3: xen 4.9.4_02-37.1

RHEL 6.10: new qemu-kvm packages.
New packages are available:
  RHEL 6: qemu-kvm 0.12.1.2-2.506.el6_10.5

RHEL 7.6: new qemu-kvm packages.
New packages are available:
  RHEL 7: qemu-kvm 1.5.3-160.el7_6.3

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 SP3: new xen packages.
New packages are available:
  SUSE LE 11 SP3: xen 4.2.5_21-45.30.1

SUSE LE 11 SP4: new kvm packages.
New packages are available:
  SUSE LE 11 SP4: kvm 1.4.2-60.21.1

SUSE LE 11 SP4: new xen packages.
New packages are available:
  SUSE LE 11 SP4: xen 4.4.4_40-61.43.2

SUSE LE 12: new qemu packages.
New packages are available:
  SUSE LE 12 SP2: qemu 2.6.2-41.49.1

SUSE LE 12 RTM: new qemu packages.
New packages are available:
  SUSE LE 12 RTM: qemu 2.0.2-48.49.3

SUSE LE 12 RTM: new xen packages (01/04/2019).
New packages are available:
  SUSE LE 12 RTM: xen 4.4.4_40-22.77.1

SUSE LE 12 SP1: new qemu packages.
New packages are available:
  SUSE LE 12 SP1: qemu 2.3.1-33.20.1

SUSE LE 12 SP1: new xen packages (01/04/2019).
New packages are available:
  SUSE LE 12 SP1: xen 4.5.5_28-22.58.1

SUSE LE 12 SP2: new xen packages.
New packages are available:
  SUSE LE 12 SP2: xen 4.7.6_06-43.48.1

SUSE LE 12 SP3: new qemu packages (12/03/2019).
New packages are available:
  SUSE LE 12 SP3: qemu 2.9.1-6.28.1

SUSE LE 12 SP4: new qemu packages.
New packages are available:
  SUSE LE 12 SP4: qemu 2.11.2-5.8.1

SUSE LE 12 SP4: new xen packages.
New packages are available:
  SUSE LE 12 SP4: xen 4.11.1_04-2.6.1

SUSE LE 15: new qemu packages.
New packages are available:
  SUSE LE 15 RTM: qemu 2.11.2-9.20.1

SUSE LE 15 SP1: new podman packages.
New packages are available:
  SUSE LE 15 SP1: podman 1.4.4-4.8.1

Ubuntu: new qemu packages.
New packages are available:
  Ubuntu 18.10: qemu 1:2.12+dfsg-3ubuntu8.6
  Ubuntu 18.04 LTS: qemu 1:2.11+dfsg-1ubuntu7.12
  Ubuntu 16.04 LTS: qemu 1:2.5+dfsg-5ubuntu10.36
  Ubuntu 14.04 LTS: qemu 2.0.0+dfsg-2ubuntu1.45
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