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How the CVE Works
The CVE-2025-30677 vulnerability in Apache Pulsar occurs due to improper logging practices in its Kafka connectors (Source, Sink, and Kafka Connect Adaptor). These connectors log sensitive configuration properties, such as Kafka credentials, in plaintext within application logs. Attackers with access to these logs can extract credentials, potentially compromising Kafka clusters. The exposure risk depends on log accessibility—unauthorized users must gain log access to exploit this flaw. Versions before 3.0.11, 3.3.6, and 4.0.4 are affected.
DailyCVE Form
Platform: Apache Pulsar
Version: <3.0.11, <3.3.6, <4.0.4
Vulnerability: Credential leakage
Severity: Medium
Date: 2025-04-09
Prediction: Patch by 2025-08-20
What Undercode Say
grep -r "kafka.password" /var/log/pulsar/ journalctl -u pulsar --no-pager | grep "sensitive"
How Exploit
1. Gain log access (e.g., misconfigured permissions).
2. Extract plaintext credentials from logs.
3. Use credentials for Kafka cluster access.
Protection from this CVE
- Upgrade to 3.0.11/3.3.6/4.0.4+.
- Restrict log file permissions.
- Enable log redaction for sensitive fields.
Impact
- Unauthorized Kafka access.
- Potential data breaches.
- Limited to log exposure.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
