Vulnerability Details : CVE-2021-3773
A flaw in netfilter could allow a network-connected attacker to infer openvpn connection endpoint information for further use in traditional network attacks.
Vulnerability category: Information leak
Exploit prediction scoring system (EPSS) score for CVE-2021-3773
Probability of exploitation activity in the next 30 days: 0.80%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 80 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-3773
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2021-3773
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: secalert@redhat.com (Secondary)
References for CVE-2021-3773
-
https://bugzilla.redhat.com/show_bug.cgi?id=2004949
2004949 – (CVE-2021-3773) CVE-2021-3773 kernel: lack of port sanity checking in natd and netfilter leads to exploit of OpenVPN clientsIssue Tracking;Third Party Advisory
-
https://www.oracle.com/security-alerts/cpujul2022.html
Oracle Critical Patch Update Advisory - July 2022Patch;Third Party Advisory
Products affected by CVE-2021-3773
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_policy:22.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:*
- cpe:2.3:a:oracle:communications_cloud_native_core_network_exposure_function:22.1.1:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*