Vulnerability Description
A flaw in netfilter could allow a network-connected attacker to infer openvpn connection endpoint information for further use in traditional network attacks.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.14 |
| Fedoraproject | Fedora | 34 |
| Redhat | Enterprise Linux | 6.0 |
| Oracle | Communications Cloud Native Core Binding Support Function | 22.1.3 |
| Oracle | Communications Cloud Native Core Network Exposure Function | 22.1.1 |
| Oracle | Communications Cloud Native Core Policy | 22.2.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2004949Issue TrackingThird Party Advisory
- https://citizenlab.ca/2024/07/vulnerabilities-in-vpns-paper-presented-at-the-pri
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2004949Issue TrackingThird Party Advisory
- https://citizenlab.ca/2024/07/vulnerabilities-in-vpns-paper-presented-at-the-pri
- https://security.netapp.com/advisory/ntap-20250328-0004/
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatchThird Party Advisory
FAQ
What is CVE-2021-3773?
CVE-2021-3773 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A flaw in netfilter could allow a network-connected attacker to infer openvpn connection endpoint information for further use in traditional network attacks.
How severe is CVE-2021-3773?
CVE-2021-3773 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-3773?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Fedoraproject Fedora, Redhat Enterprise Linux, Oracle Communications Cloud Native Core Binding Support Function, Oracle Communications Cloud Native Core Network Exposure Function.