DHCP can add routes to a client’s routing table via the classless static route option (121). VPN-based security solutions that rely on routes to redirect traffic can be forced to leak traffic over the physical interface. An attacker on the same local network can read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN.

The version of FortiClient installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-24-170 advisory.

  - DHCP can add routes to a client's routing table via the classless static route option (121). VPN-based     security solutions that rely on routes to redirect traffic can be forced to leak traffic over the physical     interface. An attacker on the same local network can read, disrupt, or possibly modify network traffic     that was expected to be protected by the VPN. (CVE-2024-3661)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of F5 Networks BIG-IP installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the K000139553 advisory.

    By design, the DHCP protocol does not authenticate messages, including for example the classless static     route option (121). An attacker with the ability to send DHCP messages can manipulate routes to redirect     VPN traffic, allowing the attacker to read, disrupt, or possibly modify network traffic that was expected     to be protected by the VPN. Many, if not most VPN systems based on IP routing are susceptible to such     attacks.(CVE-2024-3661)

Tenable has extracted the preceding description block directly from the F5 Networks BIG-IP security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
200475	Fortinet FortiClient TunnelVision - CVE-2024-3661 (FG-IR-24-170)	Nessus	Windows	low
200474	Fortinet FortiClient TunnelVision - CVE-2024-3661 (FG-IR-24-170) (macOS)	Nessus	MacOS X Local Security Checks	low
197532	F5 Networks BIG-IP : VPN TunnelVision vulnerability (K000139553)	Nessus	F5 Networks Local Security Checks	high

Detections

Analytics

CVE-2024-3661

low

Tenable Plugins

low

low

high