SB2019080215 - Improper access control in libvirt libvirt

Description

This security bulletin contains information about 1 security vulnerability.

1) Improper access control (CVE-ID: CVE-2019-10168)

The vulnerability allows a local authenticated user to execute arbitrary code.

The virConnectBaselineHypervisorCPU() and virConnectCompareHypervisorCPU() libvirt APIs, 4.x.x before 4.10.1 and 5.x.x before 5.4.1, accept an "emulator" argument to specify the program providing emulation for a domain. Since v1.2.19, libvirt will execute that program to probe the domain's capabilities. Read-only clients could specify an arbitrary path for this argument, causing libvirtd to execute a crafted executable with its own privileges.

Remediation

Install update from vendor's website.

References

• https://access.redhat.com/libvirt-privesc-vulnerabilities
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10168
• https://security.gentoo.org/glsa/202003-18