The libevt_record_values_read_event() function in libevt_record_values.c in libevt before 2018-03-17 does not properly check for out-of-bounds values of user SID data size, strings size, or data size. NOTE: the vendor has disputed this as described in libyal/libevt issue 5 on GitHub
https://www.debian.org/security/2018/dsa-4160
https://github.com/libyal/libevt/commit/9d2cc3ca0a1612a6b271abcacffc2e3eea42925e