Reachable Assertion in QEMU - CVE-2020-27617

Vulnerability identifier: #VU48761

CSH Severity: Medium

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

CVE-ID: CVE-2020-27617

CWE-ID: CWE-617

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

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

The vulnerability exists due to a reachable assertion within the eth_get_gso_type() function in net/eth.c in QEMU. A remote user with access to guest operating system can send specially crafted packet data that lacks a valid Layer 3 protocol, trigger an assertion failure and crash the QEMU process.

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

Install updates from vendor's website.

• http://www.openwall.com/lists/oss-security/2020/11/02/1
• https://lists.debian.org/debian-lts-announce/2020/11/msg00047.html
• https://lists.nongnu.org/archive/html/qemu-devel/2020-10/msg05731.html

• Denial of service in QEMU
• Denial of service in QEMU in F5 Networks BIG-IP products