SB2025090522 - Astronomer with IBM update for Kube-proxy
Published: September 5, 2025
Security Bulletin ID
SB2025090522
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Protection Mechanism Failure (CVE-ID: CVE-2021-25736)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient implementation of security measures in the Windows kube-proxy component. In a cloud environment that does not set the “.status.loadBalancer.ingress.ip” field in the LoadBalancer service status configuration (for example in AWS) the packets can be misrouted and reach an unintended destination. An attacker can bypass implemented security restrictions and perform MitM attack.
Remediation
Install update from vendor's website.