Infinite loop in QEMU - CVE-2020-14394
Published: March 17, 2023
Vulnerability identifier: #VU73788
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-14394
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: QEMU
Affected software:
QEMU
QEMU
Detailed vulnerability description
The vulnerability allows an attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop in the USB xHCI controller emulation of QEMU while computing the length of the Transfer Request Block (TRB) Ring. A privileged user on the guest OS can consume all available system resources and cause denial of service conditions of the QEMU process on the host.
How to mitigate CVE-2020-14394
Install updates from vendor's website.