CVE-2021-3499 Improper Input Validation
Attackers can bypass egress firewall rules in OVN Kubernetes due to DNS rule conflicts, potentially accessing restricted services or data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-3499?
CVE-2021-3499 is a medium-severity missing authorization vulnerability in openshift/ovn-kubernetes, published on 2 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2021-3499?
2 open source packages ship an affected version, including github.com/ovn-org/ovn-kubernetes. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/ovn-org/ovn-kubernetes Go | All versions to 0.3.0 | None |
github.com/ovn-org/ovn-kubernetes Go | All versions to 0.3.0 | None |
Products include Ovn Ovn-Kubernetes.
How do I fix CVE-2021-3499?
No fix has been published for CVE-2021-3499 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2021-3499 being exploited?
There is no known exploitation of CVE-2021-3499 in the wild and no public exploit code.
Other vulnerabilities in openshift/ovn-kubernetes
Sources
Also known as GHSA-57v4-m9jx-mh8r.