Information disclosure in Linux Linux_kernel
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 class: Information Disclosure
EPSS: 0.053 (91.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux Linux_kernel
- Oracle Communications_cloud_native_core_binding_support_function — versions 22.1.3
- Oracle Communications_cloud_native_core_network_exposure_function — versions 22.1.1
- Oracle Communications_cloud_native_core_policy — versions 22.2.0
- Fedoraproject Fedora — versions 34
- Redhat Enterprise_linux — versions 6.0, 7.0, 8.0
- N/a Kernel — versions kernel 5.14.0-49.el9, kernel 5.15.15-100.fc34, kernel 5.15.15-200.fc35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Third Party Advisory, Issue Tracking)
- secalert@redhat.com (Patch, Third Party Advisory)
- secalert@redhat.com
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2021-3773?
- CVE-2021-3773 is a critical-severity vulnerability in Linux Linux_kernel, classified under Information Disclosure. CVSS score: 9.8/10. Published 2022-02-16.
- How severe is CVE-2021-3773?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-3773 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.