The string-translate* procedure in the data-structures unit in CHICKEN before 4.10.0 allows remote attackers to cause a denial of service (crash).
https://security.gentoo.org/glsa/201612-54
https://bugzilla.redhat.com/show_bug.cgi?id=1231871
http://www.securityfocus.com/bid/97293
http://seclists.org/oss-sec/2015/q2/712
http://lists.nongnu.org/archive/html/chicken-hackers/2015-06/msg00037.html
http://lists.nongnu.org/archive/html/chicken-announce/2015-06/msg00010.html