An issue in the cp_bbs_sig function in relic/src/cp/relic_cp_bbs.c of Relic relic-toolkit 0.6.0 allows a remote attacker to obtain sensitive information and escalate privileges via the cp_bbs_sig function.
https://github.com/relic-toolkit/relic/issues/284
https://github.com/liang-junkai/Relic-bbs-fault-injection
https://gist.github.com/liang-junkai/1b59487c0f7002fa5da98035b53e409f