#VU46741 Input validation error in FreeBSD - CVE-2020-7464
Published: September 16, 2020
Vulnerability identifier: #VU46741
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-7464
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerable software:
FreeBSD
FreeBSD
Software vendor:
FreeBSD Foundation
FreeBSD Foundation
Description
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient validation of user-supplied input in ure(3) device driver for certain Realtek USB Ethernet interfaces when processing network packets larger than 2048 bytes. A remote attacker can send large frames (these can be VLAN or non-VLAN tagged packet) to the affected host and inject arbitrary packets to be received and processed by the host. As a result, an attacker can spoof packets from other hosts or inject packets into other VLANs than the host is on.
Remediation
Install updates from vendor's website.