LSM Privilege Escalation in Linux Kernel

Executive Summary

This vulnerability in the Linux kernel involves a missing lock in the LSM (Linux Security Module) subsystem. The issue is that cred_guard_mutex is not held when calling lsm_set_self_attr(), which could lead to race conditions during security attribute modifications. This affects SELinux and AppArmor, which check if a process is being ptraced before allowing transitions.

Useful 0 Not Useful 0

Detection Guidance

This vulnerability is specific to the Linux kernel and relates to LSM (Linux Security Module) handling of process attributes. Detection requires checking kernel versions and LSM behavior. Use uname -a to check kernel version and grep for LSM-related logs in dmesg or audit logs. No direct network detection commands are applicable.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability could allow local attackers to escalate privileges or bypass security restrictions by exploiting race conditions in security attribute modifications. Systems using SELinux or AppArmor may be particularly vulnerable to unauthorized access or privilege escalation.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability does not directly affect compliance with GDPR, HIPAA, or similar standards. It involves a Linux kernel security mechanism related to SELinux and AppArmor, which manage process tracing permissions. No evidence suggests this impacts data protection or privacy requirements.

Useful 0 Not Useful 0

Mitigation Strategies

Update your Linux kernel to the latest patched version to resolve this vulnerability. Monitor vendor advisories for kernel updates and apply them promptly.

Useful 0 Not Useful 0