CVE-2012-1187
📋 TL;DR
CVE-2012-1187 is a privilege escalation vulnerability in BitlBee's unix.c component where the software fails to properly drop supplementary group privileges. This allows local attackers to gain root privileges on affected systems. The vulnerability affects BitlBee installations running with setuid or setgid permissions.
💻 Affected Systems
- BitlBee
📦 What is this software?
Bitlbee by Bitlbee
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains full root privileges, enabling complete system compromise, data theft, and persistent backdoor installation.
Likely Case
Local user escalates privileges to root, gaining unauthorized access to sensitive system resources and other user accounts.
If Mitigated
If BitlBee runs without setuid/setgid or with proper privilege separation, impact is limited to the user's own permissions.
🎯 Exploit Status
Exploitation requires local access to the system. Proof-of-concept code has been publicly available since 2012.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: BitlBee 3.0.5 and later
Vendor Advisory: https://bugs.bitlbee.org/ticket/852
Restart Required: Yes
Instructions:
1. Update BitlBee to version 3.0.5 or later using your distribution's package manager. 2. Restart the BitlBee service. 3. Verify the fix by checking the version.
🔧 Temporary Workarounds
Remove setuid/setgid permissions
linuxRemove setuid or setgid permissions from BitlBee binary to prevent privilege escalation.
chmod u-s /usr/bin/bitlbee
chmod g-s /usr/bin/bitlbee
Run as non-privileged user
linuxConfigure BitlBee to run as a regular user without elevated privileges.
Edit BitlBee configuration to run under a non-root user account
🧯 If You Can't Patch
- Remove setuid/setgid permissions from BitlBee binary immediately
- Restrict local user access to systems running vulnerable BitlBee versions
🔍 How to Verify
Check if Vulnerable:
Check if BitlBee binary has setuid/setgid permissions and version is below 3.0.5: ls -l /usr/bin/bitlbee && bitlbee --versionCheck Version:
bitlbee --versionVerify Fix Applied:
Verify BitlBee version is 3.0.5 or higher and setuid/setgid bits are not set: bitlbee --version && ls -l /usr/bin/bitlbee | grep -E '^...s|^......s'📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation attempts
- BitlBee process running with root privileges from non-root users
Network Indicators:
- Not applicable - local exploit only
SIEM Query:
process.name:"bitlbee" AND user.name:!"root" AND process.privileges:"root"🔗 References
- https://access.redhat.com/security/cve/cve-2012-1187
- https://bugs.bitlbee.org/ticket/852
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-1187
- https://security-tracker.debian.org/tracker/CVE-2012-1187
- https://access.redhat.com/security/cve/cve-2012-1187
- https://bugs.bitlbee.org/ticket/852
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-1187
- https://security-tracker.debian.org/tracker/CVE-2012-1187
