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How CVE-2025-47888 Works
The Jenkins DingTalk Plugin (v2.7.3 and earlier) fails to enforce SSL/TLS certificate and hostname validation when establishing connections to DingTalk webhooks. This allows man-in-the-middle (MITM) attackers to intercept, modify, or inject malicious data into communications between Jenkins and DingTalk servers. The vulnerability stems from the plugin’s hardcoded disabling of HTTPS verification, making API calls susceptible to spoofing and data tampering. Attackers exploiting this flaw could leak sensitive build logs, manipulate notifications, or execute arbitrary commands via crafted responses.
DailyCVE Form
Platform: Jenkins DingTalk Plugin
Version: ≤ 2.7.3
Vulnerability: SSL/TLS bypass
Severity: Critical
Date: 06/12/2025
Prediction: Patch by 07/20/2025
What Undercode Say:
Exploitation Analysis
1. MITM Attack Setup:
openssl req -newkey rsa:2048 -nodes -x509 -subj "/CN=attacker.com" -out fake.crt
Intercept traffic via tools like `mitmproxy` or `Burp Suite` with a self-signed certificate.
2. Exploit Proof-of-Concept:
import requests
requests.post("https://jenkins-dingtalk/webhook", verify=False, json={"text": "malicious payload"})
Protection Measures
1. Immediate Workaround:
// Jenkinsfile script to validate certificates
System.setProperty("jsse.enableSNIExtension", "true")
2. Network-Level Mitigation:
Use iptables to restrict DingTalk plugin traffic iptables -A OUTPUT -p tcp --dport 443 -d dingtalk.com -j ACCEPT iptables -A OUTPUT -p tcp --dport 443 -j DROP
3. Patch Monitoring:
Check plugin updates via Jenkins CLI java -jar jenkins-cli.jar -s http://localhost:8080 list-plugins | grep DingTalk
4. Log Detection:
grep "SSLHandshakeException" /var/log/jenkins/jenkins.log
5. Certificate Pinning:
// Custom plugin patch to enforce certificate pinning
SSLContext sslContext = SSLContext.getInstance("TLS");
sslContext.init(null, new TrustManager[]{new X509TrustManager() {
public void checkClientTrusted(X509Certificate[] chain, String authType) {}
public void checkServerTrusted(X509Certificate[] chain, String authType) {
if (!chain[bash].getSubjectDN().getName().contains("dingtalk.com"))
throw new CertificateException("Invalid host");
}
}}, null);
6. Upgrade Command:
Manual plugin upgrade via Jenkins UI or CLI curl -X POST http://admin:API_TOKEN@localhost:8080/pluginManager/installNecessaryPlugins -d '<jenkins><install plugin="[email protected]"/></jenkins>'
7. Impact Assessment:
Audit historical webhook deliveries
find /var/lib/jenkins/ -name "dingtalk.log" -exec grep -l "HTTP/1.1 200" {} \;
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
