Use-after-free in QEMU - CVE-2020-25084

Vulnerability identifier: #VU46790

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-25084

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

The vulnerability exists due to a use-after-free error in USB(xHCI/eHCI) controller emulators of QEMU in hw/usb/hcd-xhci.c and hw/usb/hcd-ehci.c files when processing USB packets. A remote user on the guest operating system can send specially crafted data to the controller, trigger a use-after-free error and crash the QEMU process.

QEMU
BIG-IP Link Controller
BIG-IP DNS
BIG-IP AAM
BIG-IP APM
BIG-IP FPS
BIG-IP LTM
BIG-IP AFM
BIG-IP ASM
BIG-IP GTM
BIG-IP Analytics
BIG-IP PEM
BIG-IP DDHD
BIG-IP
BIG-IP SSLO
BIG-IP Advanced WAF

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

• http://seclists.org/oss-sec/2020/q3/180
• https://lists.nongnu.org/archive/html/qemu-devel/2020-08/msg08050.html
• https://lists.nongnu.org/archive/html/qemu-devel/2020-08/msg08043.html
• https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Fxhci_uaf_2

• Use-after-free in USB controller in QEMU
• Denial of service in QEMU in F5 Networks BIG-IP products