Forticlient
CVE-2024-3661
HIGH
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L
Lifecycle Timeline
1DescriptionNVD
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.
AnalysisAI
DHCP can add routes to a client’s routing table via the classless static route option (121). Rated high severity (CVSS 7.6), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
Technical ContextAI
This vulnerability is classified as Missing Authentication for Critical Function (CWE-306), which allows attackers to access critical functionality without authentication. 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. Affected products include: Fortinet Forticlient, Cisco Anyconnect Vpn Client, Cisco Secure Client, Paloaltonetworks Globalprotect, Citrix Secure Access Client.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Require authentication for all sensitive operations, implement defense in depth.
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External POC / Exploit Code
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