Language: C
Label: vulnerable
CWE: CWE-78 \u2014 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Code:
sigterm_handler(int sig)		// I - Signal number (unused)
{
  (void)sig;

  fprintf(stderr,
	  "DEBUG: beh: Job canceled.\n");

  if (job_canceled)
    _exit(CUPS_BACKEND_OK);
  else
    job_canceled = 1;
}