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/lua-cjson-2.1.0+dfsg/dtoa.c
Examining data/lua-cjson-2.1.0+dfsg/dtoa_config.h
Examining data/lua-cjson-2.1.0+dfsg/fpconv.c
Examining data/lua-cjson-2.1.0+dfsg/fpconv.h
Examining data/lua-cjson-2.1.0+dfsg/g_fmt.c
Examining data/lua-cjson-2.1.0+dfsg/lua_cjson.c
Examining data/lua-cjson-2.1.0+dfsg/strbuf.c
Examining data/lua-cjson-2.1.0+dfsg/strbuf.h

FINAL RESULTS:

data/lua-cjson-2.1.0+dfsg/dtoa.c:1787:4:  [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((char*)decimalpoint_cache, (CONST char*)s0);
data/lua-cjson-2.1.0+dfsg/fpconv.c:185:16:  [4] (format) snprintf:
  If format strings can be influenced by an attacker, they can be exploited,
  and note that sprintf variations do not always \0-terminate (CWE-134). Use
  a constant for the format specification.
        return snprintf(str, FPCONV_G_FMT_BUFSIZE, fmt, num);
data/lua-cjson-2.1.0+dfsg/fpconv.c:188:11:  [4] (format) snprintf:
  If format strings can be influenced by an attacker, they can be exploited,
  and note that sprintf variations do not always \0-terminate (CWE-134). Use
  a constant for the format specification.
    len = snprintf(buf, FPCONV_G_FMT_BUFSIZE, fmt, num);
data/lua-cjson-2.1.0+dfsg/strbuf.c:37:5:  [4] (format) vfprintf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
    vfprintf(stderr, fmt, arg);
data/lua-cjson-2.1.0+dfsg/strbuf.c:210:15:  [4] (format) vsnprintf:
  If format strings can be influenced by an attacker, they can be exploited,
  and note that sprintf variations do not always \0-terminate (CWE-134). Use
  a constant for the format specification.
    fmt_len = vsnprintf(s->buf + s->length, len, fmt, arg);
data/lua-cjson-2.1.0+dfsg/strbuf.c:236:19:  [4] (format) vsnprintf:
  If format strings can be influenced by an attacker, they can be exploited,
  and note that sprintf variations do not always \0-terminate (CWE-134). Use
  a constant for the format specification.
        fmt_len = vsnprintf(s->buf + s->length, empty_len + 1, fmt, arg);
data/lua-cjson-2.1.0+dfsg/dtoa.c:609:20:  [2] (buffer) memcpy:
  Does not check for buffer overflows when copying to destination (CWE-120).
  Make sure destination can always hold the source data.
#define Bcopy(x,y) memcpy((char *)&x->sign, (char *)&y->sign, \
data/lua-cjson-2.1.0+dfsg/dtoa.c:1500:17:  [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.
static unsigned char hexdig[256];
data/lua-cjson-2.1.0+dfsg/fpconv.c:54:5:  [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[8];
data/lua-cjson-2.1.0+dfsg/fpconv.c:108:5:  [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 localbuf[FPCONV_G_FMT_BUFSIZE];
data/lua-cjson-2.1.0+dfsg/fpconv.c:136:5:  [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(buf, nptr, buflen);
data/lua-cjson-2.1.0+dfsg/fpconv.c:176:5:  [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[FPCONV_G_FMT_BUFSIZE];
data/lua-cjson-2.1.0+dfsg/fpconv.c:177:5:  [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 fmt[6];
data/lua-cjson-2.1.0+dfsg/lua_cjson.c:114:5:  [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 escape2char[256];  /* Decoding */
data/lua-cjson-2.1.0+dfsg/lua_cjson.c:151:14:  [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.
static const char *char2escape[256] = {
data/lua-cjson-2.1.0+dfsg/lua_cjson.c:221:5:  [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 errmsg[64];
data/lua-cjson-2.1.0+dfsg/lua_cjson.c:819:5:  [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 utf8[4];       /* Surrogate pairs require 4 UTF-8 bytes */
data/lua-cjson-2.1.0+dfsg/strbuf.h:130:5:  [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->buf + s->length, c, len);
data/lua-cjson-2.1.0+dfsg/strbuf.h:136:5:  [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->buf + s->length, c, len);
data/lua-cjson-2.1.0+dfsg/dtoa.c:1786:12:  [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).
				MALLOC(strlen((CONST char*)s0) + 1))) {

ANALYSIS SUMMARY:

Hits = 20
Lines analyzed = 6600 in approximately 0.15 seconds (43746 lines/second)
Physical Source Lines of Code (SLOC) = 5207
Hits@level = [0]  11 [1]   1 [2]  13 [3]   0 [4]   6 [5]   0
Hits@level+ = [0+]  31 [1+]  20 [2+]  19 [3+]   6 [4+]   6 [5+]   0
Hits/KSLOC@level+ = [0+] 5.95352 [1+] 3.84098 [2+] 3.64893 [3+] 1.15229 [4+] 1.15229 [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.