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Vulnerability of QEMU: privilege escalation via Virtiofsd Xattrmap Option

Synthesis of the vulnerability 

An attacker, inside a guest system, can bypass restrictions via Virtiofsd Xattrmap Option of QEMU, in order to escalate his privileges on the host system.
Impacted products: QEMU, SLES.
Severity of this bulletin: 1/4.
Creation date: 08/03/2021.
Références of this threat: CVE-2021-20263, SUSE-SU-2021:1942-1, VIGILANCE-VUL-34767.

Description of the vulnerability 

An attacker, inside a guest system, can bypass restrictions via Virtiofsd Xattrmap Option of QEMU, in order to escalate his privileges on the host system.
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This security note impacts software or systems such as QEMU, SLES.

Our Vigil@nce team determined that the severity of this threat announce is low.

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 announce.

Solutions for this threat 

QEMU: patch for Virtiofsd Xattrmap Option.
A patch is indicated in information sources.

SUSE LE 15 SP3: new qemu packages.
New packages are available:
  SUSE LE 15 SP3: qemu 5.2.0-17.1
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