Ruby Permissions Privileges and Access Controls Vulnerability - CVE-2008-3655
Ruby 1.8.5 and earlier 1.8.6 through 1.8.6-p286 1.8.7 through 1.8.7-p71 and 1.9 through r18423 does not properly restrict access to critical variables and methods at various safe levels which allows context-dependent attackers to bypass intended access restrictions via (1) untrace_var (2) PROGRAM_NAME and (3) syslog at safe level 4 and (4) insecure methods at safe levels 1 through 3.