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CVE-2024-3661

DHCP routing options can manipulate interface-based VPN traffic

Published: May 6, 2024Updated: Jan 15, 2025 Sources: CVE List NVD BDUCWE-306
NVD MITRE
7.6CVSSHIGH
EPSS Score
4.1%
Top 10.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:UC:HI:LA:L
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-306CWE-501

Affected Products

DHCPIETF
forticlientfortinetSecurity Products
anyconnect vpn clientcisco
On-prem
Networking Infrastructure / router-switch
secure clientcisco
On-prem
Networking Infrastructure / router-switch
globalprotectpaloaltonetworksSecurity Products
fortinetcommercialUSSecurity Productsaka forti net
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
paloaltonetworkscommercialUSSecurity Productsaka palo alto networks, panw
and 10 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://datatracker.ietf.org/doc/html/rfc2131#section-7
datatracker.ietf.org
https://datatracker.ietf.org/doc/html/rfc3442#section-7
datatracker.ietf.org
https://tunnelvisionbug.com/
tunnelvisionbug.com
and 30 more references View all →

Timeline

Published
May 6, 2024
Last Updated
Jan 15, 2025

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