SB2022031048 - Uncontrolled Recursion in Istio
Published: March 10, 2022 Updated: April 20, 2026
Security Bulletin ID
SB2022031048
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Uncontrolled Recursion (CVE-ID: CVE-2022-24726)
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to stack exhaustion in the istiod control plane when processing specially crafted or oversized messages sent to the Kubernetes validating or mutating webhook service. A remote attacker can send a specially crafted or oversized message to cause a denial of service.
Exploitation is possible when the webhook service is exposed publicly on TLS port 15017.
Remediation
Install update from vendor's website.