Medium severity · published Jun 2, 2021
CVE-2021-3499
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
5.6
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OV
Ovn-kubernetes · Ovn
through 0.3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3499
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3499
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1949188
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