CVE-2025-5467

# CVE-2025-5467 PoC - 检测Apport崩溃文件权限 # 适用于Ubuntu及使用Apport的衍生版 import os import glob import pwd import grp import stat def check_crash_file_permissions(): """ Check for incorrectly owned crash files in Apport directories """ crash_dirs = ['/var/crash', '/var/tmp/apport.*', '/tmp/*.crash'] issues = [] current_user = pwd.getpwuid(os.getuid()).pw_name current_groups = [g.gr_name for g in grp.getgrall() if current_user in g.gr_mem] current_groups.append(pwd.getpwuid(os.getuid()).pw_gid) for pattern in crash_dirs: for crash_file in glob.glob(pattern): if not os.path.isfile(crash_file): continue file_stat = os.stat(crash_file) file_group = grp.getgrgid(file_stat.st_gid).gr_name # Check if current user has access but shouldn't if file_stat.st_mode & stat.S_IRGRP: # Group has read access if file_group not in ['root', 'adm', 'crash'] and file_group not in current_groups: issues.append({ 'file': crash_file, 'group': file_group, 'mode': oct(file_stat.st_mode), 'issue': 'Unexpected group ownership on crash file' }) return issues if __name__ == '__main__': issues = check_crash_file_permissions() if issues: print(f"Found {len(issues)} potentially misconfigured crash files:") for issue in issues: print(f" {issue['file']} - Group: {issue['group']}") else: print("No obvious permission issues found in crash files.") # Mitigation: Run 'apport-checkreports' or 'apport-crashdb' with proper permissions # Fix: Update Apport to patched version or patch process_crash() function

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