high
7.6
CWE
306 501
EPSS
0.047%
Advisory Published
Updated

CVE-2024-3661: DHCP routing options can manipulate interface-based VPN traffic

First published: Mon May 06 2024(Updated: )

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.

Credit: 9119a7d8-5eab-497f-8521-727c672e3725

Affected SoftwareAffected VersionHow to fix
Fortinet FortiClient>=6.4.0<7.2.5
Fortinet FortiClient>=6.4.0<7.2.5
Fortinet FortiClient SSL VPN>=6.4.0<7.2.5
Fortinet FortiClient=7.4.0
Fortinet FortiClient=7.4.0
Fortinet FortiClient SSL VPN=7.4.0
Cisco AnyConnect Secure Mobility Client
Cisco Secure Client
Palo Alto Networks GlobalProtect for iOS
Palo Alto Networks GlobalProtect
Palo Alto Networks GlobalProtect
Palo Alto Networks GlobalProtect Windows
All of
Citrix Secure Access Client<24.06.1
Any of
iOS
Apple iOS and macOS
All of
Citrix Secure Access Client<24.8.5
Linux Kernel
F5 BIG-IP Access Policy Manager>=7.2.3<=7.2.5
F5 BIG-IP Access Policy Manager>=15.1.0<=15.1.10
F5 BIG-IP Access Policy Manager>=16.1.0<=16.1.5
F5 BIG-IP Access Policy Manager>=17.1.0<=17.1.2
WatchGuard IPSec Mobile VPN Client
WatchGuard IPSec Mobile VPN Client for Windows
WatchGuard Mobile VPN with SSL for MacOS
WatchGuard Mobile VPN with SSL for Windows
Zscaler Client Connector<1.5.1.25
Zscaler Client Connector<4.2.0.282
Zscaler Client Connector>=3.7<3.7.0.134
Zscaler Client Connector Windows

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2024-3661?

    CVE-2024-3661 is considered a high severity vulnerability that can lead to the leakage of VPN traffic.

  • How do I fix CVE-2024-3661?

    To mitigate CVE-2024-3661, it is recommended to update affected software to the latest available versions that address this vulnerability.

  • What software is affected by CVE-2024-3661?

    CVE-2024-3661 affects various versions of Fortinet FortiClient, Cisco AnyConnect, Palo Alto Networks GlobalProtect, F5 BIG-IP Access Policy Manager, and more.

  • What type of attack does CVE-2024-3661 involve?

    CVE-2024-3661 involves an attacker on the same local network using rogue DHCP servers to manipulate routing tables.

  • Can CVE-2024-3661 lead to data exposure?

    Yes, CVE-2024-3661 can potentially lead to data exposure due to the leakage of VPN traffic over unsecured networks.

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