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/sslh-1.20/echosrv.c
Examining data/sslh-1.20/probe.c
Examining data/sslh-1.20/probe.h
Examining data/sslh-1.20/sslh-fork.c
Examining data/sslh-1.20/sslh-select.c
Examining data/sslh-1.20/systemd-sslh-generator.c
Examining data/sslh-1.20/tls.c
Examining data/sslh-1.20/tls.h
Examining data/sslh-1.20/common.c
Examining data/sslh-1.20/common.h
Examining data/sslh-1.20/sslh-main.c

FINAL RESULTS:

data/sslh-1.20/common.c:547:9:  [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, msg, ap);
data/sslh-1.20/common.c:623:9:  [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(addr_str, STRING_UNKNOWN);
data/sslh-1.20/common.c:626:5:  [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(host, STRING_UNKNOWN);
data/sslh-1.20/echosrv.c:104:5:  [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(buffer, prefix);
data/sslh-1.20/sslh-main.c:100:5:  [4] (format) fprintf:
  If format strings can be influenced by an attacker, they can be exploited
  (CWE-134). Use a constant for the format specification.
    fprintf(stderr, USAGE_STRING, prots);
data/sslh-1.20/sslh-main.c:303:9:  [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 (sni_hostname_list[i], config_item);
data/sslh-1.20/systemd-sslh-generator.c:13:5:  [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(conn, hostname);
data/sslh-1.20/systemd-sslh-generator.c:15:5:  [4] (buffer) strcat:
  Does not check for buffer overflows when concatenating to destination
  [MS-banned] (CWE-120). Consider using strcat_s, strncat, strlcat, or
  snprintf (warning: strncat is easily misused).
    strcat(conn, port);
data/sslh-1.20/systemd-sslh-generator.c:58:21:  [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((*listen)[i], resolve_listen(hostname, port));
data/sslh-1.20/systemd-sslh-generator.c:123:9:  [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(runtime_conf, runtime_unit_dir);
data/sslh-1.20/systemd-sslh-generator.c:124:9:  [4] (buffer) strcat:
  Does not check for buffer overflows when concatenating to destination
  [MS-banned] (CWE-120). Consider using strcat_s, strncat, strlcat, or
  snprintf (warning: strncat is easily misused).
        strcat(runtime_conf, unit_file);
data/sslh-1.20/common.c:768:15:  [3] (misc) chroot:
  chroot can be very helpful, but is hard to use correctly (CWE-250, CWE-22).
  Make sure the program immediately chdir("/"), closes file descriptors, and
  drops root privileges, and that all necessary files (and no more!) are in
  the new root.
        res = chroot(chroot_path);
data/sslh-1.20/common.c:61:5:  [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[NI_MAXHOST];
data/sslh-1.20/common.c:263:5:  [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[NI_MAXHOST];
data/sslh-1.20/common.c:325:5:  [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(p, data, data_size);
data/sslh-1.20/common.c:388:4:  [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[BUFSIZ];
data/sslh-1.20/common.c:441:4:  [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 host[NI_MAXHOST], serv[NI_MAXSERV];
data/sslh-1.20/common.c:559:5:  [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 peer[MAX_NAMELENGTH], service[MAX_NAMELENGTH],
data/sslh-1.20/common.c:612:5:  [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 addr_str[NI_MAXHOST], host[NI_MAXHOST];
data/sslh-1.20/common.c:797:9:  [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).
    f = fopen(pidfile, "w");
data/sslh-1.20/echosrv.c:98:5:  [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 buffer[1 << 20];
data/sslh-1.20/probe.c:346:5:  [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 buffer[BUFSIZ];
data/sslh-1.20/sslh-main.c:122:5:  [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[NI_MAXHOST];
data/sslh-1.20/sslh-main.c:155:9:  [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(setting, "tls"); /* legacy configuration */
data/sslh-1.20/sslh-main.c:167:13:  [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(argv[i], "--tls");
data/sslh-1.20/sslh-main.c:490:5:  [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(all_options, const_options, sizeof(const_options));
data/sslh-1.20/sslh-main.c:576:13:  [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(p, &builtins[c-PROT_SHIFT], sizeof(*p));
data/sslh-1.20/sslh-main.c:593:32:  [2] (integer) atoi:
  Unless checked, the resulting number can exceed the expected range
  (CWE-190). If source untrusted, check both minimum and maximum, even if the
  input had no minus sign (large numbers can roll over into negative number;
  consider saving to an unsigned value if that is intended).
             probing_timeout = atoi(optarg);
data/sslh-1.20/systemd-sslh-generator.c:99:14:  [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).
    config = fopen(sslh_conf, "r");
data/sslh-1.20/systemd-sslh-generator.c:102:18:  [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).
        config = fopen(sslh_conf, "r");
data/sslh-1.20/systemd-sslh-generator.c:125:27:  [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).
        runtime_conf_fd = fopen(runtime_conf, "w");
data/sslh-1.20/tls.c:270:5:  [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(name_nullterminated, name, name_len);
data/sslh-1.20/common.c:394:13:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
   size_r = read(from, buffer, sizeof(buffer));
data/sslh-1.20/common.c:459:12:  [1] (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 character.
           strcpy(host, "?");
data/sslh-1.20/common.c:460:12:  [1] (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 character.
           strcpy(serv, "?");
data/sslh-1.20/echosrv.c:101:18:  [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).
    prefix_len = strlen(prefix);
data/sslh-1.20/echosrv.c:107:15:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
        ret = read(fd, buffer + prefix_len, sizeof(buffer));
data/sslh-1.20/probe.c:196:15:  [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 (len < strlen(opt))
data/sslh-1.20/probe.c:199:29:  [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).
    return !strncmp(p, opt, strlen(opt));
data/sslh-1.20/probe.c:350:9:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
    n = read(cnx->q[0].fd, buffer, sizeof(buffer));
data/sslh-1.20/sslh-main.c:287:27:  [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).
        server_name_len = strlen(server_name);
data/sslh-1.20/systemd-sslh-generator.c:11:25:  [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).
    char *conn = malloc(strlen(hostname)+strlen(port)+2);
data/sslh-1.20/systemd-sslh-generator.c:11:42:  [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).
    char *conn = malloc(strlen(hostname)+strlen(port)+2);
data/sslh-1.20/systemd-sslh-generator.c:14:5:  [1] (buffer) strcat:
  Does not check for buffer overflows when concatenating to destination
  [MS-banned] (CWE-120). Consider using strcat_s, strncat, strlcat, or
  snprintf (warning: strncat is easily misused). Risk is low because the
  source is a constant character.
    strcat(conn, ":");
data/sslh-1.20/systemd-sslh-generator.c:56:43:  [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).
                    (*listen)[i] = malloc(strlen(resolve_listen(hostname, port)));
data/sslh-1.20/systemd-sslh-generator.c:119:25:  [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).
        size_t uf_len = strlen(unit_file);
data/sslh-1.20/systemd-sslh-generator.c:120:30:  [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).
        size_t runtime_len = strlen(runtime_unit_dir) + uf_len + 1;

ANALYSIS SUMMARY:

Hits = 47
Lines analyzed = 3508 in approximately 0.12 seconds (28634 lines/second)
Physical Source Lines of Code (SLOC) = 2455
Hits@level = [0]  93 [1]  15 [2]  20 [3]   1 [4]  11 [5]   0
Hits@level+ = [0+] 140 [1+]  47 [2+]  32 [3+]  12 [4+]  11 [5+]   0
Hits/KSLOC@level+ = [0+] 57.0265 [1+] 19.1446 [2+] 13.0346 [3+] 4.88798 [4+] 4.48065 [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.