What’s Vulnerable › Vulnerabilities

CVE-2021-3499

• Severity: medium (CVSS 5.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-02 · updated 2026-06-17
• Weakness: CWE-863

Description

A vulnerability was found in OVN Kubernetes in versions up to and including 0.3.0 where the Egress Firewall does not reliably apply firewall rules when there is multiple DNS rules. It could lead to potentially lose of confidentiality, integrity or availability of a service.

Affected products

• ovn-kubernetes: through 0.3.0

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1949188
• https://bugzilla.redhat.com/show_bug.cgi?id=1949188

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