CVE-2024-25638
📋 TL;DR
This vulnerability in dnsjava allows attackers to inject malicious DNS records from different zones into DNS responses, potentially enabling DNS cache poisoning or redirection attacks. Any Java application using vulnerable versions of dnsjava for DNS resolution is affected, particularly those that trust DNS responses without additional validation.
💻 Affected Systems
- dnsjava
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete DNS cache poisoning leading to traffic redirection to attacker-controlled infrastructure, enabling man-in-the-middle attacks, credential theft, or malware distribution.
Likely Case
DNS spoofing attacks that redirect users to malicious sites or intercept sensitive communications in applications that rely on DNS resolution.
If Mitigated
Limited impact if applications implement additional DNS response validation or use DNSSEC, though basic DNS resolution remains vulnerable.
🎯 Exploit Status
Exploitation requires network access to intercept or spoof DNS responses, but the vulnerability itself is straightforward to exploit once that access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.6.0
Vendor Advisory: https://github.com/dnsjava/dnsjava/security/advisories/GHSA-cfxw-4h78-h7fw
Restart Required: Yes
Instructions:
1. Update dnsjava dependency to version 3.6.0 or later. 2. Update your project's dependency management file (pom.xml for Maven, build.gradle for Gradle). 3. Rebuild and redeploy your application. 4. Restart any running services using dnsjava.
🔧 Temporary Workarounds
Implement DNS Response Validation
allAdd custom validation to verify DNS responses match the original query before processing.
Use DNSSEC
allEnable DNSSEC validation to ensure DNS responses are cryptographically signed and authentic.
🧯 If You Can't Patch
- Implement network segmentation to restrict DNS traffic to trusted resolvers only.
- Deploy intrusion detection systems to monitor for DNS spoofing attempts and anomalous DNS responses.
🔍 How to Verify
Check if Vulnerable:
Check your project's dependency files (pom.xml, build.gradle) for dnsjava version. If version is below 3.6.0, you are vulnerable.Check Version:
For Maven: mvn dependency:tree | grep dnsjava. For Gradle: gradle dependencies | grep dnsjava.Verify Fix Applied:
After updating, verify dnsjava version is 3.6.0 or higher in your dependency files and rebuilt application.📡 Detection & Monitoring
Log Indicators:
- Unexpected DNS responses with records from unrelated zones
- DNS resolution failures or timeouts
- Unusual DNS query patterns
Network Indicators:
- DNS responses containing records from zones not matching the query
- Suspicious DNS traffic from unexpected sources
SIEM Query:
dns.query AND (dns.response.records.zone != dns.query.zone)🔗 References
- https://github.com/dnsjava/dnsjava/commit/2073a0cdea2c560465f7ac0cc56f202e6fc39705
- https://github.com/dnsjava/dnsjava/security/advisories/GHSA-cfxw-4h78-h7fw
- https://github.com/dnsjava/dnsjava/commit/bc51df1c455e6c9fb7cbd42fcb6d62d16047818d
- https://github.com/dnsjava/dnsjava/security/advisories/GHSA-cfxw-4h78-h7fw
