The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of Xen: privilege escalation via Live EPT PTE

Synthesis of the vulnerability 

An attacker, inside a guest system, can bypass restrictions via Live EPT PTE of Xen, in order to escalate his privileges on the host system.
Vulnerable products: Debian, Fedora, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Xen.
Severity of this weakness: 2/4.
Creation date: 07/07/2020.
Références of this bulletin: CERTFR-2020-AVI-414, CVE-2020-15567, DSA-4723-1, FEDORA-2020-76cf2b0f0a, FEDORA-2020-fbc13516af, openSUSE-SU-2020:0965-1, openSUSE-SU-2020:0985-1, SUSE-SU-2020:14521-1, SUSE-SU-2020:1886-1, SUSE-SU-2020:1887-1, SUSE-SU-2020:1888-1, SUSE-SU-2020:1889-1, SUSE-SU-2020:1891-1, SUSE-SU-2020:2822-1, VIGILANCE-VUL-32742, XSA-328.

Description of the vulnerability 

An attacker, inside a guest system, can bypass restrictions via Live EPT PTE of Xen, in order to escalate his privileges on the host system.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

This weakness note impacts software or systems such as Debian, Fedora, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Xen.

Our Vigil@nce team determined that the severity of this threat note 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 weakness.

Solutions for this threat 

Xen: patch for Live EPT PTE.
A patch is available:
  http://xenbits.xen.org/xsa/xsa328/xsa328-1.patch
  http://xenbits.xen.org/xsa/xsa328/xsa328-2.patch
  http://xenbits.xen.org/xsa/xsa328/xsa328-4.9-1.patch
  http://xenbits.xen.org/xsa/xsa328/xsa328-4.9-2.patch
  http://xenbits.xen.org/xsa/xsa328/xsa328-4.11-1.patch
  http://xenbits.xen.org/xsa/xsa328/xsa328-4.11-2.patch
  http://xenbits.xen.org/xsa/xsa328/xsa328-4.12-1.patch
  http://xenbits.xen.org/xsa/xsa328/xsa328-4.12-2.patch
  http://xenbits.xen.org/xsa/xsa328/xsa328-4.13-1.patch
  http://xenbits.xen.org/xsa/xsa328/xsa328-4.13-2.patch

Debian 10: new xen packages.
New packages are available:
  Debian 10: xen 4.11.4+24-gddaaccbbab-1~deb10u1

Fedora 31: new xen packages.
New packages are available:
  Fedora 31: xen 4.12.3-3.fc31

Fedora 32: new xen packages.
New packages are available:
  Fedora 32: xen 4.13.1-4.fc32

openSUSE Leap 15.1: new xen packages (16/07/2020).
New packages are available:
  openSUSE Leap 15.1: xen 4.12.3_04-lp151.2.21.1

openSUSE Leap 15.2: new xen packages.
New packages are available:
  openSUSE Leap 15.2: xen 4.13.1_04-lp152.2.3.1

SUSE LE 11 SP4: new xen packages.
New packages are available:
  SUSE LE 11 SP4: xen 4.4.4_44-61.55.1

SUSE LE 12 SP2: new xen packages.
New packages are available:
  SUSE LE 12 SP2: xen 4.7.6_10-43.67.1

SUSE LE: new xen packages.
New packages are available:
  SUSE LE 12 SP3: xen 4.9.4_08-3.66.1
  SUSE LE 12 SP4: xen 4.11.4_04-2.30.1
  SUSE LE 12 SP5: xen 4.12.3_04-3.18.1
  SUSE LE 15 RTM: xen 4.10.4_12-3.35.1
  SUSE LE 15 SP1: xen 4.12.3_04-3.22.1
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

Computer vulnerabilities tracking service 

Vigil@nce provides a software vulnerability workaround. Each administrator can customize the list of products for which he wants to receive vulnerability alerts.