Vulnerability identifier: #VU46741
Vulnerability risk: Medium
Exploitation vector: Local network
Exploit availability: No
Vendor: FreeBSD Foundation
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.
Install updates from vendor's website.
Vulnerable software versions
FreeBSD: 11.0, 11.1, 11.2, 11.3, 11.4, 12.0, 12.1, 12.2
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.