NULL pointer dereference in the _fields_add function in fields.c in libbibcore.a in bibutils through 6.2 allows remote attackers to cause a denial of service (application crash), as demonstrated by end2xml.

Read access violation in the isiin_keyword function in isiin.c in libbibutils.a in bibutils through 6.2 allows remote attackers to cause a denial of service (application crash), as demonstrated by isi2xml.

NULL pointer deference in the addsn function in serialno.c in libbibcore.a in bibutils through 6.2 allows remote attackers to cause a denial of service (application crash), as demonstrated by copac2xml.