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GHSA-hqmp-g7ph-x543
No affected components available
A new decloaking technique for nearly all VPN implementations has been found, which allows attackers to inject entries into the routing tables of unsuspecting victims using DHCP option 121. This allows attackers to redirect traffic, which is supposed to be sent encrypted over the VPN, through the physical interface handling DHCP for the network the victim's computer is connected to, effectively bypassing the VPN connection.
Impact
All users are potentially affected, as this attack vector can be used against any VPN implementation without mitigations in place.
Patches
Currently, there are no existing mitigations employed by Quincy.
Workarounds
Disabling DHCP option 121 in the DHCP client is a potential workaround, as it prevents this kind of attack.
References
https://www.leviathansecurity.com/blog/tunnelvision
The vulnerability can be exploited over a local network, such as Wi-Fi. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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