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Vulnerability of QEMU: assertion error via innbd_negotiate_send_rep_verr

Synthesis of the vulnerability 

An attacker can force an assertion error via innbd_negotiate_send_rep_verr() of QEMU, in order to trigger a denial of service.
Impacted software: openSUSE Leap, QEMU, SLES, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 09/06/2020.
Références of this announce: CVE-2020-10761, openSUSE-SU-2020:1108-1, SUSE-SU-2020:2015-1, USN-4467-1, VIGILANCE-VUL-32464.

Description of the vulnerability 

An attacker can force an assertion error via innbd_negotiate_send_rep_verr() of QEMU, in order to trigger a denial of service.
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This security bulletin impacts software or systems such as openSUSE Leap, QEMU, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity announce is medium.

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

An attacker with a expert ability can exploit this vulnerability alert.

Solutions for this threat 

QEMU: version 5.0.1.
The version 5.0.1 is fixed:
  https://www.qemu.org/download/#source

QEMU: patch for innbd_negotiate_send_rep_verr.
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-lp152.9.3.1

SUSE LE 15 SP2: new qemu packages.
New packages are available:
  SUSE LE 15 SP2: qemu 4.2.1-11.4.4

Ubuntu: new qemu packages.
New packages are available:
  Ubuntu 20.04 LTS: qemu 1:4.2-3ubuntu6.4
  Ubuntu 18.04 LTS: qemu 1:2.11+dfsg-1ubuntu7.31
  Ubuntu 16.04 LTS: qemu 1:2.5+dfsg-5ubuntu10.45
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