Flawfinder version 2.0.10, (C) 2001-2019 David A. Wheeler.
Number of rules (primarily dangerous function names) in C/C++ ruleset: 223
Examining data/ruby-redcloth-4.3.2/ext/redcloth_scan/redcloth.h

FINAL RESULTS:

data/ruby-redcloth-4.3.2/ext/redcloth_scan/redcloth.h:173:7:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
      sprintf(listm, "%s_open", list_type); \
data/ruby-redcloth-4.3.2/ext/redcloth_scan/redcloth.h:214:9:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
        sprintf(listm, "%s_close", RSTRING_PTR(end_list)); \
data/ruby-redcloth-4.3.2/ext/redcloth_scan/redcloth.h:18:40:  [1] (buffer) strlen:
  Does not handle strings that are not \0-terminated; if given one it may
  perform an over-read (it could cause a crash if unprotected) (CWE-126).
#define STR_NEW2(p) rb_enc_str_new((p),strlen(p),rb_enc_from_index(ENCODING_GET(self)))

ANALYSIS SUMMARY:

Hits = 3
Lines analyzed = 220 in approximately 0.02 seconds (9785 lines/second)
Physical Source Lines of Code (SLOC) = 201
Hits@level = [0]   0 [1]   1 [2]   0 [3]   0 [4]   2 [5]   0
Hits@level+ = [0+]   3 [1+]   3 [2+]   2 [3+]   2 [4+]   2 [5+]   0
Hits/KSLOC@level+ = [0+] 14.9254 [1+] 14.9254 [2+] 9.95025 [3+] 9.95025 [4+] 9.95025 [5+]   0
Dot directories skipped = 1 (--followdotdir overrides)
Minimum risk level = 1
Not every hit is necessarily a security vulnerability.
There may be other security vulnerabilities; review your code!
See 'Secure Programming HOWTO'
(https://dwheeler.com/secure-programs) for more information.