Very Low
Kubectl/API Server YAML parsing vulnerable to "Billion Laughs" Attack
CVE ID
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Kubectl/API Server YAML parsing vulnerable to "Billion Laughs" Attack
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
Description
Improper input validation in the Kubernetes API server in versions v1.0-1.12 and versions prior to v1.13.12, v1.14.8, v1.15.5, and v1.16.2 allows authorized users to send malicious YAML or JSON payloads, causing the API server to consume excessive CPU or memory, potentially crashing and becoming unavailable. Prior to v1.14.0, default RBAC policy authorized anonymous users to submit requests that could trigger this vulnerability. Clusters upgraded from a version prior to v1.14.0 keep the more permissive policy by default for backwards compatibility.
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Ratings
-
Attacker ValueVery Low
-
ExploitabilityVery Low
Technical Analysis
As I understand it, most kubernetes clusters will require auth or a foothold to reach in the first place. Why would you bother with a DoS attack at that point? Much more attacker value to be had in exploiting the cluster in ways that don’t bring it down.
Compare authenticated:
https://www.shodan.io/search?query=kubernetes+401
And unauthenticated searches:
https://www.shodan.io/search?query=kubernetes+%21401
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General Information
Vendors
- kubernetes,
- redhat
Products
- kubernetes,
- openshift container platform 3.10,
- openshift container platform 3.11,
- openshift container platform 3.9
References
Advisory
Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Exploited in the Wild
CVE ID
AttackerKB requires a CVE ID in order to pull vulnerability data and references from the CVE list and the National Vulnerability Database. If available, please supply below: