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/tantan-23/src/tantan.cc
Examining data/tantan-23/src/tantan_repeat_finder.cc
Examining data/tantan-23/src/mcf_fasta_sequence.cc
Examining data/tantan-23/src/mcf_alphabet.cc
Examining data/tantan-23/src/mcf_tantan_options.cc
Examining data/tantan-23/src/mcf_util.cc
Examining data/tantan-23/src/mcf_score_matrix.cc
Examining data/tantan-23/src/tantan_app.cc
Examining data/tantan-23/src/LambdaCalculator.cc

FINAL RESULTS:

data/tantan-23/src/mcf_fasta_sequence.cc:49:47:  [3] (random) setstate:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
  if (firstChar != '>' && firstChar != '@') s.setstate(std::ios::failbit);
data/tantan-23/src/mcf_score_matrix.cc:136:11:  [3] (random) setstate:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
        s.setstate(std::ios::failbit);
data/tantan-23/src/mcf_tantan_options.cc:33:10:  [3] (buffer) getopt:
  Some older implementations do not protect against internal buffer overflows
  (CWE-120, CWE-20). Check implementation on installation, or limit the size
  of all string inputs.
  return getopt(argc, argv, optstring);
data/tantan-23/src/mcf_tantan_options.cc:40:7:  [3] (random) setstate:
  This function is not sufficiently random for security-related functions
  such as key and nonce creation (CWE-327). Use a more secure technique for
  acquiring random values.
    s.setstate(std::ios::failbit);
data/tantan-23/src/LambdaCalculator.cc:18:3:  [2] (buffer) char:
  Statically-sized arrays can be improperly restricted, leading to potential
  overflows or other issues (CWE-119!/CWE-120). Perform bounds checking, use
  functions that limit length, or ensure that the size is larger than the
  maximum possible length.
  char buffer[32];
data/tantan-23/src/LambdaCalculator.cc:19:3:  [2] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf. Risk is low because the source has a constant maximum length.
  sprintf(buffer, "%g", x);
data/tantan-23/src/mcf_util.cc:11:7:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
  ifs.open(fileName.c_str());
data/tantan-23/src/mcf_util.cc:18:7:  [2] (misc) open:
  Check when opening files - can an attacker redirect it (via symlinks),
  force the opening of special file type (e.g., device files), move things
  around to create a race condition, control its ancestors, or change its
  contents? (CWE-362).
  ofs.open(fileName.c_str());

ANALYSIS SUMMARY:

Hits = 8
Lines analyzed = 2212 in approximately 0.07 seconds (33028 lines/second)
Physical Source Lines of Code (SLOC) = 1753
Hits@level = [0]   0 [1]   0 [2]   4 [3]   4 [4]   0 [5]   0
Hits@level+ = [0+]   8 [1+]   8 [2+]   8 [3+]   4 [4+]   0 [5+]   0
Hits/KSLOC@level+ = [0+] 4.56361 [1+] 4.56361 [2+] 4.56361 [3+] 2.2818 [4+]   0 [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.