Vulnerable 2.4.5 systime markers:
timeclock
date -s '%04d-%02d-%02d %02d:%02d:%02d'
fork_exec
timeclock
date -s '%s'
fork_exec

Fixed 2.5.12 systime markers:
timeclock
date -s '%04d-%02d-%02d %02d:%02d:%02d'
fork_exec
date -s '%s'
gsub
fork_exec

Proof summary:
vuln attempt 1 proof: VULN_ATTEMPT_1_COMMAND_EXECUTED
vuln attempt 2 proof: VULN_ATTEMPT_2_COMMAND_EXECUTED
fixed attempt 1 no proof file (negative control passed)
fixed attempt 2 no proof file (negative control passed)