CVE Catalog

CVE-2023-36673

HighCVSS 7.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.62%

45th percentile - higher than 45% of all known CVEs

Summary

An issue was discovered in Avira Phantom VPN through 2.23.1 for macOS, causing the VPN client to insecurely configure the operating system. As a result, all IP traffic to the VPN server's IP address is sent in plaintext outside the VPN tunnel, allowing attackers to intercept this traffic.

Risk Assessment

The organization is at risk of exposing sensitive data, as IP traffic can be directed to arbitrary IP addresses in plaintext. Attackers may exploit this vulnerability to capture user data.

Recommendation

It is recommended to update Avira Phantom VPN to the latest version to mitigate this vulnerability. Additionally, consider using alternative VPN solutions that provide better data protection.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS