CVE-2023-46047
📋 TL;DR
A local attacker can execute arbitrary code by providing a crafted configuration file to the sanei_configure_attach() function in Sane 1.2.1. This vulnerability requires local access to the system and the ability to control configuration files. The impact is limited to systems running vulnerable versions of Sane with attacker-controlled configuration files.
💻 Affected Systems
- Sane (Scanner Access Now Easy)
📦 What is this software?
Sane Backends by Sane Project
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation leading to full system compromise via arbitrary code execution.
Likely Case
Local user gains elevated privileges or executes malicious code within the Sane process context.
If Mitigated
No impact if configuration files are properly secured and not attacker-controlled.
🎯 Exploit Status
Exploit details available in public disclosures. Requires local access and ability to provide crafted configuration file.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GitLab issue for latest patched version
Vendor Advisory: https://gitlab.com/sane-project/backends/-/issues/708
Restart Required: Yes
Instructions:
1. Check GitLab issue #708 for patch details. 2. Update Sane to patched version. 3. Restart Sane services.
🔧 Temporary Workarounds
Secure Configuration Files
linuxRestrict write access to Sane configuration files to prevent attacker control.
chmod 644 /etc/sane.d/*.conf
chown root:root /etc/sane.d/*.conf
Disable Unnecessary Backends
linuxDisable Sane backends that are not required to reduce attack surface.
Comment out unnecessary backends in /etc/sane.d/dll.conf
🧯 If You Can't Patch
- Implement strict file permissions on Sane configuration directories
- Monitor for unauthorized changes to Sane configuration files
🔍 How to Verify
Check if Vulnerable:
Check Sane version: scanimage --version. If version is 1.2.1, system may be vulnerable.Check Version:
scanimage --versionVerify Fix Applied:
Verify Sane version is updated beyond 1.2.1 and check GitLab issue #708 for patch confirmation.📡 Detection & Monitoring
Log Indicators:
- Sane process crashes
- Unusual configuration file modifications
Network Indicators:
- Local privilege escalation attempts
SIEM Query:
Process:scanimage AND (EventID:1000 OR ConfigurationFileModified)