CVE-2024-7830
📋 TL;DR
A critical buffer overflow vulnerability in D-Link NAS devices allows remote attackers to execute arbitrary code by manipulating the photo_name parameter in the cgi_move_photo function. This affects multiple D-Link NAS models that are no longer supported by the vendor. Attackers can exploit this remotely without authentication to potentially take full control of affected devices.
💻 Affected Systems
- D-Link DNS-120
- DNR-202L
- DNS-315L
- DNS-320
- DNS-320L
- DNS-320LW
- DNS-321
- DNR-322L
- DNS-323
- DNS-325
- DNS-326
- DNS-327L
- DNR-326
- DNS-340L
- DNS-343
- DNS-345
- DNS-726-4
- DNS-1100-4
- DNS-1200-05
- DNS-1550-04
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, data theft, ransomware deployment, or use as a botnet node
Likely Case
Remote code execution allowing attackers to install malware, steal data, or pivot to internal networks
If Mitigated
Limited impact if devices are isolated from internet and internal networks with strict access controls
🎯 Exploit Status
Public exploit code is available on GitHub. The vulnerability is remotely exploitable without authentication, making it attractive for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10383
Restart Required: No
Instructions:
No official patch available. Vendor recommends retiring and replacing all affected devices as they are end-of-life.
🔧 Temporary Workarounds
Disable CGI endpoint via firewall
linuxBlock access to the vulnerable CGI endpoint using network firewall rules
iptables -A INPUT -p tcp --dport 80 -m string --string "/cgi-bin/photocenter_mgr.cgi" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/cgi-bin/photocenter_mgr.cgi" --algo bm -j DROP
Disable Photo Center feature
allTurn off the Photo Center functionality if available in device settings
🧯 If You Can't Patch
- Immediately disconnect affected devices from the internet and isolate them from internal networks
- Replace all affected D-Link NAS devices with supported, secure alternatives
🔍 How to Verify
Check if Vulnerable:
Check device model and firmware version against affected list. If device is one of the listed models, assume vulnerable.Check Version:
Check device web interface or use manufacturer-specific CLI commands for firmware versionVerify Fix Applied:
No fix available to verify. Only complete replacement of affected devices resolves the vulnerability.📡 Detection & Monitoring
Log Indicators:
- Unusual requests to /cgi-bin/photocenter_mgr.cgi with long photo_name parameters
- Multiple failed buffer overflow attempts in web logs
- Unexpected process execution or system changes
Network Indicators:
- HTTP POST requests to photocenter_mgr.cgi with unusually long parameters
- Traffic patterns suggesting exploit delivery to NAS devices
SIEM Query:
source="web_logs" AND uri="/cgi-bin/photocenter_mgr.cgi" AND (param_length>100 OR contains(param,"photo_name"))