Infinite loop in QEMU - CVE-2019-12068

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Main Vulnerability Database Vulnerabilities #VU22783

Infinite loop in QEMU - CVE-2019-12068

Published: November 14, 2019 / Updated: April 28, 2020


Vulnerability identifier: #VU22783
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-12068
CWE-ID: CWE-835
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in lsi_execute_script() when reading empty opcode. A local user can consume all available system resources and cause denial of service conditions.


Affected software

QEMU
Ubuntu
Opensuse
qemu-system-common (Ubuntu package)
qemu-user-static (Ubuntu package)
qemu-kvm (Ubuntu package)
qemu (Ubuntu package)
qemu-utils (Ubuntu package)
qemu-system-x86 (Ubuntu package)
qemu-common (Ubuntu package)
qemu (Debian package)

How to mitigate CVE-2019-12068

Install update from vendor's website.

QEMU - update to 4.1.1
qemu-system-common (Ubuntu package) - update to 2.0.0+dfsg-2ubuntu1.47
qemu-user-static (Ubuntu package) - update to 2.0.0+dfsg-2ubuntu1.47
qemu-kvm (Ubuntu package) - update to 2.0.0+dfsg-2ubuntu1.47
qemu (Ubuntu package) - addressed in versions 2.0.0+dfsg-2ubuntu1.47, 1:2.5+dfsg-5ubuntu10.42, 1:2.11+dfsg-1ubuntu7.20, 1:3.1+dfsg-2ubuntu3.6, 1:4.0+dfsg-0ubuntu9.1
qemu-utils (Ubuntu package) - update to 2.0.0+dfsg-2ubuntu1.47
qemu-system-x86 (Ubuntu package) - update to 2.0.0+dfsg-2ubuntu1.47
qemu-common (Ubuntu package) - update to 2.0.0+dfsg-2ubuntu1.47
qemu (Debian package) - update to 1:3.1+dfsg-8+deb10u5

External References

Related Security Bulletins