CVE-2021-3773CWE-200

A flaw in netfilter could allow a network-connected attacker to infer openvpn connection endpoint information for further use in traditional network attacks

published February 16, 2022

CVSS
—
EPSS
5%
Percentile
92.5
In the wild
Unconfirmed
What it is

⚠️ A crafty network attacker could sneak in and sniff out your OpenVPN endpoint info! 🌐 Think of it like a eavesdropper in a crowded café, tuning in on your conversations to gather sensitive details about your plans. In this case, the attacker is using a flaw in netfilter to piece together your connection details like puzzle pieces, potentially leading to a bigger attack. If exploited, this vulnerability could allow an attacker to infer critical OpenVPN connection endpoint information, like revealing your private meeting spots to a nosy neighbor. While it's not a direct breach, it sets the stage for traditional network attacks that could compromise your security. Scary stuff, right?

Put simply

Think of it like a eavesdropper in a crowded café, tuning in on your conversations to gather sensitive details about your plans. In this case, the attacker is using a flaw in netfilter to piece together your connection details like puzzle pieces, potentially leading to a bigger attack. This vulnerability in netfilter allows a network-connected attacker to glean information about OpenVPN connections. It exposes endpoint details without requiring authentication, which could be leveraged for further attacks.

What to do

If exploited, this vulnerability could allow an attacker to infer critical OpenVPN connection endpoint information, like revealing your private meeting spots to a nosy neighbor. While it's not a direct breach, it sets the stage for traditional network attacks that could compromise your security. Scary stuff, right? To mitigate this risk, ensure your firewall rules are properly configured to limit exposure to external networks. Additionally, consider updating to the latest version of OpenVPN and netfilter as patches become available. Regular security audits are also a great habit! You've got this! By following these steps, you can tighten your security and keep those pesky eavesdroppers at bay! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.05279 · 92.5th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2022-02-16T18:35Z
EPSS history
Timeline
  • 16 FEB 18:35Z
    A flaw in netfilter could allow a network-connected attacker to infer openvpn connection endpoint information for further use in traditional network attacks
    cvelistv5