CVE-2026-0710
📋 TL;DR
A NULL pointer dereference vulnerability in SIPp allows remote attackers to crash the application via specially crafted SIP messages, causing denial of service. Under specific conditions, it may enable unauthorized code execution. This affects systems running vulnerable versions of SIPp that process SIP traffic.
💻 Affected Systems
- SIPp
⚠️ 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
Remote code execution leading to complete system compromise, data theft, and persistent backdoor installation.
Likely Case
Denial of service through application crashes, disrupting SIP-based communications and services.
If Mitigated
Limited impact with proper network segmentation and monitoring, potentially only causing temporary service interruptions.
🎯 Exploit Status
Exploitation requires sending crafted SIP messages during an active call, which may require some protocol knowledge but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Red Hat advisory for specific patched versions
Vendor Advisory: https://access.redhat.com/security/cve/CVE-2026-0710
Restart Required: Yes
Instructions:
1. Check Red Hat advisory for affected packages. 2. Update SIPp to patched version via package manager. 3. Restart SIPp service. 4. Verify fix with version check.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict network access to SIPp services to trusted sources only using firewalls.
iptables -A INPUT -p tcp --dport 5060 -s trusted_network -j ACCEPT
iptables -A INPUT -p udp --dport 5060 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 5060 -j DROP
iptables -A INPUT -p udp --dport 5060 -j DROP
Rate Limiting
linuxImplement rate limiting on SIP ports to reduce impact of denial-of-service attempts.
iptables -A INPUT -p tcp --dport 5060 -m limit --limit 10/min -j ACCEPT
iptables -A INPUT -p udp --dport 5060 -m limit --limit 10/min -j ACCEPT
🧯 If You Can't Patch
- Deploy network-based intrusion prevention systems (IPS) to detect and block malicious SIP traffic.
- Monitor SIPp logs and system performance for crash indicators and investigate anomalies immediately.
🔍 How to Verify
Check if Vulnerable:
Check SIPp version against vendor advisory; if unpatched and processing SIP traffic, assume vulnerable.Check Version:
sipp --version or check package manager (e.g., rpm -q sipp or dpkg -l sipp)Verify Fix Applied:
Confirm SIPp version matches patched version from vendor advisory and service remains stable under normal SIP traffic.📡 Detection & Monitoring
Log Indicators:
- SIPp crash logs, segmentation fault errors in system logs, abnormal termination of SIPp process
Network Indicators:
- Unusual SIP message patterns, high volume of SIP traffic to SIPp ports, malformed SIP packets
SIEM Query:
source="sipp.log" AND ("segmentation fault" OR "crash" OR "NULL pointer")