CVE-2023-36673 Information disclosure in n/a
An attacker can intercept plaintext traffic and DNS queries by exploiting insecure routing and DNS configuration in the Avira Phantom VPN client.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-36673?
CVE-2023-36673 is a high-severity vulnerability in n/a, published on 9 Aug 2023. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
An issue was discovered in Avira Phantom VPN through 2.23.1 for macOS. The VPN client insecurely configures the operating system such that all IP traffic to the VPN server's IP address is sent in plaintext outside the VPN tunnel, even if this traffic is not generated by the VPN client, while simultaneously using plaintext DNS to look up the VPN server's IP address. This allows an adversary to trick the victim into sending traffic to arbitrary IP addresses in plaintext outside the VPN tunnel. NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to "ServerIP attack, combined with DNS spoofing, that can leak traffic to an arbitrary IP address" rather than to only Avira Phantom VPN.
Weakness: CWE-319
Which versions are affected by CVE-2023-36673?
It affects 1 product.
Products include Avira Phantom Vpn.
How do I fix CVE-2023-36673?
No fix has been published for CVE-2023-36673 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-36673 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-36673 exists.
Sources
Also known as GHSA-r43q-w67j-2696.