CVE-2024-58250
📋 TL;DR
The passprompt plugin in pppd (Point-to-Point Protocol daemon) before version 2.5.2 mishandles privileges, potentially allowing local privilege escalation. This affects systems using ppp for network connections, particularly those with the passprompt plugin enabled. Attackers could exploit this to gain elevated privileges on vulnerable systems.
💻 Affected Systems
- ppp (Point-to-Point Protocol daemon)
⚠️ 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
Local attacker gains root privileges, leading to complete system compromise, data theft, and persistent backdoor installation.
Likely Case
Local user escalates privileges to root, enabling unauthorized access to sensitive system resources and configuration.
If Mitigated
With proper privilege separation and minimal user access, impact is limited to the compromised user's scope.
🎯 Exploit Status
Requires local access to the system. The privilege mishandling suggests straightforward exploitation once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.5.2
Vendor Advisory: https://ppp.samba.org
Restart Required: Yes
Instructions:
1. Download ppp 2.5.2 from https://ppp.samba.org 2. Compile and install according to distribution instructions 3. Restart pppd services
🔧 Temporary Workarounds
Disable passprompt plugin
linuxRemove or comment out passprompt plugin usage in pppd configuration files
# Edit /etc/ppp/options or relevant config file
# Remove or comment line containing 'plugin passprompt.so'
🧯 If You Can't Patch
- Restrict local user access to systems running pppd with passprompt plugin
- Implement strict privilege separation and monitor for unusual privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check pppd version with 'pppd --version' and verify if passprompt plugin is enabled in configurationCheck Version:
pppd --versionVerify Fix Applied:
Confirm pppd version is 2.5.2 or later with 'pppd --version'📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation in system logs
- pppd process running with unexpected privileges
Network Indicators:
- None (local exploit only)
SIEM Query:
Process creation where parent process is pppd and privileges are elevated unexpectedly