CVE-2025-67858
📋 TL;DR
This vulnerability allows attackers to manipulate JSON configuration data passed to nftables (nft) through Foomuuri, potentially leading to firewall rule modification or other unspecified impacts. It affects Foomuuri installations before version 0.31. The vulnerability stems from improper neutralization of argument delimiters in JSON input.
💻 Affected Systems
- Foomuuri
⚠️ 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 firewall configuration compromise allowing network traffic redirection, service disruption, or potential privilege escalation through manipulated nft rules.
Likely Case
Unauthorized modification of firewall rules leading to network access control bypass or service interruption.
If Mitigated
Limited impact if proper input validation and D-Bus authorization are implemented, restricting configuration changes to authorized users only.
🎯 Exploit Status
Exploitation requires access to Foomuuri's D-Bus interface or ability to influence JSON configuration input. The lack of D-Bus authorization mentioned in references suggests potential privilege escalation vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.31 or later
Vendor Advisory: https://security.opensuse.org/2026/01/07/foomuuri-lack-of-dbus-authorization.html
Restart Required: Yes
Instructions:
1. Update Foomuuri to version 0.31 or later using your distribution's package manager. 2. For SUSE/openSUSE: 'sudo zypper update foomuuri'. 3. Restart Foomuuri service: 'sudo systemctl restart foomuuri'.
🔧 Temporary Workarounds
Restrict D-Bus access
linuxImplement D-Bus policy restrictions to limit which users/processes can interact with Foomuuri's interface
sudo nano /etc/dbus-1/system.d/org.foomuuri.conf
Add appropriate <policy> restrictions for user/group access
Disable Foomuuri if not needed
linuxStop and disable the Foomuuri service if firewall management through this tool is not required
sudo systemctl stop foomuuri
sudo systemctl disable foomuuri
🧯 If You Can't Patch
- Implement strict network segmentation to limit access to systems running vulnerable Foomuuri versions
- Monitor nftables configuration changes and D-Bus activity for unauthorized modifications
🔍 How to Verify
Check if Vulnerable:
Check Foomuuri version: 'foomuuri --version' or 'rpm -q foomuuri' (SUSE) or check package manager. If version is below 0.31, system is vulnerable.Check Version:
foomuuri --version || rpm -q foomuuri || dpkg -l | grep foomuuriVerify Fix Applied:
Verify Foomuuri version is 0.31 or later: 'foomuuri --version'. Check that D-Bus policies are properly configured if using workaround.📡 Detection & Monitoring
Log Indicators:
- Unexpected nftables configuration changes in system logs
- D-Bus authentication failures or unauthorized access attempts to org.foomuuri interface
- JSON parsing errors in Foomuuri logs
Network Indicators:
- Unexpected firewall rule changes affecting network traffic patterns
- Unauthorized network access through modified firewall rules
SIEM Query:
source="foomuuri.log" AND ("configuration change" OR "JSON error" OR "authentication failure") OR source="dbus.log" AND destination="org.foomuuri"