CVE-2024-3661
CVE-2024-3661 · DHCP routing options can manipulate interface-based VPN traffic
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
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 7.6 · High · EPSS 4.1%
- Published
- Updated
Stack: system
Affected products and versions
dhcp
- Versions
- 0: Affected
No fix published
openvpn Ubuntu:Pro:14.04:LTS
- Versions
- 2.3.2-4ubuntu1
- 2.3.2-5ubuntu1
- 2.3.2-7ubuntu1
- 2.3.2-7ubuntu2
- 2.3.2-7ubuntu3
- 2.3.2-7ubuntu3.1
- 2.3.2-7ubuntu3.2
- 2.3.2-7ubuntu3.2+esm1
- 2.3.2-7ubuntu3.2+esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
pptpd Ubuntu:14.04:LTS
- Versions
- 1.3.4-6ubuntu1
- 1.3.4+27+gddb30f8-1ubuntu1
- 1.3.4+27+gddb30f8-1ubuntu1.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
network-manager-pptp Ubuntu:16.04:LTS
- Versions
- 0.9.10.0-1ubuntu1
- 1.0.2-0ubuntu1
- 1.0.6-1ubuntu1
- 1.0.8-2ubuntu1
- 1.1.93-1
- 1.1.93-1ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openvpn Ubuntu:Pro:16.04:LTS
- Versions
- 2.3.7-1ubuntu1
- 2.3.7-2ubuntu1
- 2.3.8-1ubuntu1
- 2.3.10-1ubuntu1
- 2.3.10-1ubuntu2
- 2.3.10-1ubuntu2.1
- 2.3.10-1ubuntu2.2
- 2.3.10-1ubuntu2.2+esm1
- 2.3.10-1ubuntu2.2+esm2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
pptp-linux Ubuntu:16.04:LTS
- Versions
- 1.8.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
pptpd Ubuntu:16.04:LTS
- Versions
- 1.3.4+27+gddb30f8-1ubuntu1
- 1.4.0-6
- 1.4.0-7
- 1.4.0-7ubuntu0.1
- 1.4.0-7ubuntu0.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
connman Ubuntu:Pro:16.04:LTS
- Versions
- 1.21-1.2
- 1.21-1.2build1
- 1.21-1.2build2
- 1.21-1.2+deb8u1build0.16.04.1
- 1.21-1.2+deb8u1ubuntu0.1~esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
gadmin-openvpn-client Ubuntu:16.04:LTS
- Versions
- 0.1.2-4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
gadmin-openvpn-server Ubuntu:16.04:LTS
- Versions
- 0.1.5-3.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
kvpnc Ubuntu:16.04:LTS
- Versions
- 0.9.6a-2.1build1
- 0.9.6a-3
- 0.9.6a-4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
n2n Ubuntu:16.04:LTS
- Versions
- 1.3.1~svn3789-5
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
network-manager-iodine Ubuntu:16.04:LTS
- Versions
- 0.0.5-1ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
network-manager-openconnect Ubuntu:16.04:LTS
- Versions
- 1.0.2-1build1
- 1.2.0-0ubuntu0.16.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
network-manager-openvpn Ubuntu:16.04:LTS
- Versions
- 0.9.10.0-1ubuntu2
- 1.1.93-1
- 1.1.93-1ubuntu1
- 1.1.93-1ubuntu1.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
network-manager-strongswan Ubuntu:16.04:LTS
- Versions
- 1.3.1-1ubuntu1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
network-manager-vpnc Ubuntu:16.04:LTS
- Versions
- 0.9.10.0-1ubuntu1
- 1.0.8-1ubuntu1
- 1.1.93-1
- 1.1.93-1ubuntu0.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
openconnect Ubuntu:16.04:LTS
- Versions
- 7.06-2build1
- 7.06-2build2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
sshuttle Ubuntu:16.04:LTS
- Versions
- 0.71-1
- 0.75-1
- 0.76-1
- 0.76-1ubuntu1
- 0.76-1ubuntu1.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
tinc Ubuntu:16.04:LTS
- Versions
- 1.0.26-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
vpnc Ubuntu:16.04:LTS
- Versions
- 0.5.3r550-2
- 0.5.3r550-2build1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
wireguard Ubuntu:16.04:LTS
- Versions
- 1.0.20200513-1~16.04.1
- 1.0.20200513-1~16.04.2
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
network-manager-openvpn Ubuntu:18.04:LTS
- Versions
- 1.2.10-0ubuntu2
- 1.8.0-2
- 1.8.0-3
- 1.8.2-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
network-manager-pptp Ubuntu:18.04:LTS
- Versions
- 1.2.4-4
- 1.2.4-5build1
- 1.2.6-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://datatracker.ietf.org/doc/html/rfc2131#section-7
- https://datatracker.ietf.org/doc/html/rfc3442#section-7
- https://tunnelvisionbug.com/
- https://www.leviathansecurity.com/research/tunnelvision
- https://news.ycombinator.com/item?id=40279632
- https://arstechnica.com/security/2024/05/novel-attack-against-virtually-all-vpn-apps-neuters-their-entire-purpose/
- https://krebsonsecurity.com/2024/05/why-your-vpn-may-not-be-as-secure-as-it-claims/
- https://issuetracker.google.com/issues/263721377
- https://mullvad.net/en/blog/evaluating-the-impact-of-tunnelvision
- https://www.zscaler.com/blogs/security-research/cve-2024-3661-k-tunnelvision-exposes-vpn-bypass-vulnerability
- https://lowendtalk.com/discussion/188857/a-rogue-dhcp-server-within-your-network-can-and-will-hijack-your-vpn-traffic
- https://news.ycombinator.com/item?id=40284111
- https://www.agwa.name/blog/post/hardening_openvpn_for_def_con
- https://www.theregister.com/2024/05/07/vpn_tunnelvision_dhcp/
- https://support.citrix.com/article/CTX677069/cloud-software-group-security-advisory-for-cve20243661
- https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2024-00009
- https://bst.cisco.com/quickview/bug/CSCwk05814
- https://security.paloaltonetworks.com/CVE-2024-3661
- https://fortiguard.fortinet.com/psirt/FG-IR-24-170
- https://my.f5.com/manage/s/article/K000139553
- https://nvd.nist.gov/vuln/detail/CVE-2024-3661