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/xletters-1.1.1/xletters.c
Examining data/xletters-1.1.1/xletters.h

FINAL RESULTS:

data/xletters-1.1.1/xletters.c:281:9:  [4] (buffer) fscanf:
  The scanf() family's %s operation, without a limit specification, permits
  buffer overflows (CWE-120, CWE-20). Specify a limit to %s, or use a
  different input function.
    if (fscanf(hsf,"%s %lu %d %ld %lu\n",hstable[i].name,
data/xletters-1.1.1/xletters.c:906:3:  [4] (buffer) strcpy:
  Does not check for buffer overflows when copying to destination [MS-banned]
  (CWE-120). Consider using snprintf, strcpy_s, or strlcpy (warning: strncpy
  easily misused).
  strcpy(tmp1,wordpath);
data/xletters-1.1.1/xletters.c:913:7:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
      sprintf(tmp2,"%s/%s/%s",getenv("HOME"),&p[1],wordfile);
data/xletters-1.1.1/xletters.c:915:7:  [4] (buffer) sprintf:
  Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or
  vsnprintf.
      sprintf(tmp2,"%s/%s",p,wordfile);
data/xletters-1.1.1/xletters.c:595:13:  [3] (random) random:
  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.
      len = random()%5+5;
data/xletters-1.1.1/xletters.c:602:37:  [3] (random) random:
  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.
      for (i=0;i<len;i++) s[i] = 33+random()%94;
data/xletters-1.1.1/xletters.c:610:19:  [3] (random) random:
  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.
      do curpos = random()%wordf_len; while (wordf[curpos]!='\n');
data/xletters-1.1.1/xletters.c:647:25:  [3] (random) random:
  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.
    words[nb_words].x = random()%(WIDTH-words[nb_words].width);
data/xletters-1.1.1/xletters.c:651:8:  [3] (random) random:
  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.
      +random()%(HEIGHT-(fnt_info->ascent+fnt_info->descent)))*1000;
data/xletters-1.1.1/xletters.c:913:31:  [3] (buffer) getenv:
  Environment variables are untrustable input if they can be set by an
  attacker. They can have any content and length, and the same variable can
  be set more than once (CWE-807, CWE-20). Check environment variables
  carefully before using them.
      sprintf(tmp2,"%s/%s/%s",getenv("HOME"),&p[1],wordfile);
data/xletters-1.1.1/xletters.c:957:3:  [3] (random) srandom:
  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.
  srandom(time(NULL));
data/xletters-1.1.1/xletters.c:99:1:  [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 deathword[MAX_WORDSIZE+1];
data/xletters-1.1.1/xletters.c:208:3:  [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 name[1024];
data/xletters-1.1.1/xletters.c:266:9:  [2] (misc) fopen:
  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).
  hsf = fopen(SCOREFILE,"r+");
data/xletters-1.1.1/xletters.c:268:11:  [2] (misc) fopen:
  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).
    hsf = fopen(SCOREFILE,"w+");
data/xletters-1.1.1/xletters.c:271:13:  [2] (misc) fopen:
  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).
      hsf = fopen(SCOREFILE,"r");
data/xletters-1.1.1/xletters.c:290:7:  [2] (buffer) strcpy:
  Does not check for buffer overflows when copying to destination [MS-banned]
  (CWE-120). Consider using snprintf, strcpy_s, or strlcpy (warning: strncpy
  easily misused). Risk is low because the source is a constant string.
      strcpy(hstable[i].name,"Joe_Player");
data/xletters-1.1.1/xletters.c:355:3:  [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 s[256];
data/xletters-1.1.1/xletters.c:356:3:  [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(s,"Lives: %d",lives);
data/xletters-1.1.1/xletters.c:366:3:  [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 s[256];
data/xletters-1.1.1/xletters.c:368:5:  [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(s,"Score: %ld (+%ld)",score,vpoints);
data/xletters-1.1.1/xletters.c:370:5:  [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(s,"Score: %ld",score);
data/xletters-1.1.1/xletters.c:380:3:  [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 s[256];
data/xletters-1.1.1/xletters.c:381:3:  [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(s,"Level: %d",level);
data/xletters-1.1.1/xletters.c:608:7:  [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 tmp[MAX_WORDSIZE+1];
data/xletters-1.1.1/xletters.c:622:7:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
      memcpy(s,tmp,len);
data/xletters-1.1.1/xletters.c:762:3:  [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 tmp[MAX_WORDSIZE+1];
data/xletters-1.1.1/xletters.c:777:3:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
  memcpy(s,tmp,len);
data/xletters-1.1.1/xletters.c:827:3:  [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 buf[KBD_1BUF_SIZE];
data/xletters-1.1.1/xletters.c:904:3:  [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 tmp1[512], tmp2[512], *p;
data/xletters-1.1.1/xletters.c:917:13:  [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).
    word_fd=open(tmp2,O_RDONLY,0);
data/xletters-1.1.1/xletters.c:252:3:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120).
  strncpy(yours.name,pwent->pw_gecos,1000);
data/xletters-1.1.1/xletters.c:575:33:  [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).
  while (strncmp(wordf+curpos,s,strlen(s)) != 0)
data/xletters-1.1.1/xletters.c:582:20:  [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).
  if (wordf[curpos+strlen(s)] == '\n') return 2;
data/xletters-1.1.1/xletters.c:615:13:  [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).
      len = strlen(tmp);
data/xletters-1.1.1/xletters.c:635:23:  [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).
  words[nb_words].len=strlen(words[nb_words].s);

ANALYSIS SUMMARY:

Hits = 36
Lines analyzed = 1225 in approximately 0.05 seconds (22512 lines/second)
Physical Source Lines of Code (SLOC) = 947
Hits@level = [0]  18 [1]   5 [2]  20 [3]   7 [4]   4 [5]   0
Hits@level+ = [0+]  54 [1+]  36 [2+]  31 [3+]  11 [4+]   4 [5+]   0
Hits/KSLOC@level+ = [0+] 57.0222 [1+] 38.0148 [2+] 32.735 [3+] 11.6156 [4+] 4.22386 [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.