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<title>Flawfinder Results</title>
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<h1>Flawfinder Results</h1>
Here are the security scan results from
<a href="http://www.dwheeler.com/flawfinder">Flawfinder version 1.28</a>,
(C) 2001-2007 <a href="http://www.dwheeler.com">David A. Wheeler</a>.
Number of dangerous functions in C/C++ ruleset: 160
<p>
Examining test.c <br>
Examining test2.c <br>
<ul>
<li>test.c:32: <b> [5] </b> (buffer) <i> gets:
Does not check for buffer overflows (CWE-120). Use fgets() instead. </i>
<pre>
gets(f);
</pre>
<li>test.c:56: <b> [5] </b> (buffer) <i> strncat:
Easily used incorrectly (e.g., incorrectly computing the correct
maximum size to add) (CWE-120). Consider strcat_s, strlcat, or automatically
resizing strings. Risk is high; the length parameter appears to be a
constant, instead of computing the number of characters left. </i>
<pre>
strncat(d,s,sizeof(d)); /* Misuse - this should be flagged as riskier. */
</pre>
<li>test.c:57: <b> [5] </b> (buffer) <i> _tcsncat:
Easily used incorrectly (e.g., incorrectly computing the correct
maximum size to add) (CWE-120). Consider strcat_s, strlcat, or automatically
resizing strings. Risk is high; the length parameter appears to be a
constant, instead of computing the number of characters left. </i>
<pre>
_tcsncat(d,s,sizeof(d)); /* Misuse - flag as riskier */
</pre>
<li>test.c:60: <b> [5] </b> (buffer) <i> MultiByteToWideChar:
Requires maximum length in CHARACTERS, not bytes (CWE-120). Risk is
high, it appears that the size is given as bytes, but the function
requires size as characters. </i>
<pre>
MultiByteToWideChar(CP_ACP,0,szName,-1,wszUserName,sizeof(wszUserName));
</pre>
<li>test.c:62: <b> [5] </b> (buffer) <i> MultiByteToWideChar:
Requires maximum length in CHARACTERS, not bytes (CWE-120). Risk is
high, it appears that the size is given as bytes, but the function
requires size as characters. </i>
<pre>
MultiByteToWideChar(CP_ACP,0,szName,-1,wszUserName,sizeof wszUserName);
</pre>
<li>test.c:73: <b> [5] </b> (misc) <i> SetSecurityDescriptorDacl:
Never create NULL ACLs; an attacker can set it to Everyone (Deny All
Access), which would even forbid administrator access (CWE-732). </i>
<pre>
SetSecurityDescriptorDacl(&amp;sd,TRUE,NULL,FALSE);
</pre>
<li>test.c:73: <b> [5] </b> (misc) <i> SetSecurityDescriptorDacl:
Never create NULL ACLs; an attacker can set it to Everyone (Deny All
Access), which would even forbid administrator access (CWE-732). </i>
<pre>
SetSecurityDescriptorDacl(&amp;sd,TRUE,NULL,FALSE);
</pre>
<li>test.c:17: <b> [4] </b> (buffer) <i> strcpy:
Does not check for buffer overflows when copying to destination
(CWE-120). Consider using strcpy_s, strncpy, or strlcpy (warning, strncpy is
easily misused). </i>
<pre>
strcpy(b, a);
</pre>
<li>test.c:20: <b> [4] </b> (buffer) <i> sprintf:
Does not check for buffer overflows (CWE-120). Use sprintf_s,
snprintf, or vsnprintf. </i>
<pre>
sprintf(s, "hello %s", bug);
</pre>
<li>test.c:21: <b> [4] </b> (buffer) <i> sprintf:
Does not check for buffer overflows (CWE-120). Use sprintf_s,
snprintf, or vsnprintf. </i>
<pre>
sprintf(s, gettext("hello %s"), bug);
</pre>
<li>test.c:22: <b> [4] </b> (format) <i> sprintf:
Potential format string problem (CWE-134). Make format string
constant. </i>
<pre>
sprintf(s, unknown, bug);
</pre>
<li>test.c:23: <b> [4] </b> (format) <i> printf:
If format strings can be influenced by an attacker, they can be
exploited (CWE-134). Use a constant for the format specification. </i>
<pre>
printf(bf, x);
</pre>
<li>test.c:25: <b> [4] </b> (buffer) <i> scanf:
The scanf() family's %s operation, without a limit specification,
permits buffer overflows (CWE-120). Specify a limit to %s, or use a
different input function. </i>
<pre>
scanf("%s", s);
</pre>
<li>test.c:27: <b> [4] </b> (buffer) <i> scanf:
The scanf() family's %s operation, without a limit specification,
permits buffer overflows (CWE-120). Specify a limit to %s, or use a
different input function. </i>
<pre>
scanf("%s", s);
</pre>
<li>test.c:38: <b> [4] </b> (format) <i> syslog:
If syslog's format strings can be influenced by an attacker, they can
be exploited (CWE-134). Use a constant format string for syslog. </i>
<pre>
syslog(LOG_ERR, attacker_string);
</pre>
<li>test.c:49: <b> [4] </b> (buffer) <i> _mbscpy:
Does not check for buffer overflows when copying to destination
(CWE-120). Consider using a function version that stops copying at the end of
the buffer. </i>
<pre>
_mbscpy(d,s); /* like strcpy, this doesn't check for buffer overflow */
</pre>
<li>test.c:52: <b> [4] </b> (buffer) <i> lstrcat:
Does not check for buffer overflows when concatenating to destination
(CWE-120). </i>
<pre>
lstrcat(d,s);
</pre>
<li>test.c:75: <b> [3] </b> (shell) <i> CreateProcess:
This causes a new process to execute and is difficult to use safely
(CWE-78). Specify the application path in the first argument, NOT as part
of the second, or embedded spaces could allow an attacker to force a
different program to run. </i>
<pre>
CreateProcess(NULL, "C:\\Program Files\\GoodGuy\\GoodGuy.exe -x", "");
</pre>
<li>test.c:75: <b> [3] </b> (shell) <i> CreateProcess:
This causes a new process to execute and is difficult to use safely
(CWE-78). Specify the application path in the first argument, NOT as part
of the second, or embedded spaces could allow an attacker to force a
different program to run. </i>
<pre>
CreateProcess(NULL, "C:\\Program Files\\GoodGuy\\GoodGuy.exe -x", "");
</pre>
<li>test.c:91: <b> [3] </b> (buffer) <i> getopt_long:
Some older implementations do not protect against internal buffer
overflows (CWE-120). Check implementation on installation, or limit the
size of all string inputs. </i>
<pre>
while ((optc = getopt_long (argc, argv, "a",longopts, NULL )) != EOF) {
</pre>
<li>test.c:16: <b> [2] </b> (buffer) <i> strcpy:
Does not check for buffer overflows when copying to destination
(CWE-120). Consider using strcpy_s, strncpy, or strlcpy (warning, strncpy is
easily misused). Risk is low because the source is a constant string. </i>
<pre>
strcpy(a, gettext("Hello there")); // Did this work?
</pre>
<li>test.c:19: <b> [2] </b> (buffer) <i> 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. </i>
<pre>
sprintf(s, "hello");
</pre>
<li>test.c:45: <b> [2] </b> (buffer) <i> char:
Statically-sized arrays can be overflowed (CWE-120). Perform bounds
checking, use functions that limit length, or ensure that the size is
larger than the maximum possible length (CWE-119). </i>
<pre>
char d[20];
</pre>
<li>test.c:46: <b> [2] </b> (buffer) <i> char:
Statically-sized arrays can be overflowed (CWE-120). Perform bounds
checking, use functions that limit length, or ensure that the size is
larger than the maximum possible length (CWE-119). </i>
<pre>
char s[20];
</pre>
<li>test.c:50: <b> [2] </b> (buffer) <i> memcpy:
Does not check for buffer overflows when copying to destination
(CWE-120). Make sure destination can always hold the source data. </i>
<pre>
memcpy(d,s);
</pre>
<li>test.c:51: <b> [2] </b> (buffer) <i> CopyMemory:
Does not check for buffer overflows when copying to destination
(CWE-120). Make sure destination can always hold the source data. </i>
<pre>
CopyMemory(d,s);
</pre>
<li>test.c:97: <b> [2] </b> (misc) <i> 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). </i>
<pre>
f = fopen("/etc/passwd", "r");
</pre>
<li>test.c:15: <b> [1] </b> (buffer) <i> strcpy:
Does not check for buffer overflows when copying to destination
(CWE-120). Consider using strcpy_s, strncpy, or strlcpy (warning, strncpy is
easily misused). Risk is low because the source is a constant
character. </i>
<pre>
strcpy(a, "\n"); // Did this work?
</pre>
<li>test.c:18: <b> [1] </b> (buffer) <i> sprintf:
Does not check for buffer overflows (CWE-120). Use sprintf_s,
snprintf, or vsnprintf. Risk is low because the source is a constant character. </i>
<pre>
sprintf(s, "\n");
</pre>
<li>test.c:26: <b> [1] </b> (buffer) <i> scanf:
it's unclear if the %s limit in the format string is small enough
(CWE-120). Check that the limit is sufficiently small, or use a different
input function. </i>
<pre>
scanf("%10s", s);
</pre>
<li>test.c:53: <b> [1] </b> (buffer) <i> strncpy:
Easily used incorrectly; doesn't always \0-terminate or check for
invalid pointers (CWE-120). </i>
<pre>
strncpy(d,s);
</pre>
<li>test.c:54: <b> [1] </b> (buffer) <i> _tcsncpy:
Easily used incorrectly; doesn't always \0-terminate or check for
invalid pointers (CWE-120). </i>
<pre>
_tcsncpy(d,s);
</pre>
<li>test.c:55: <b> [1] </b> (buffer) <i> strncat:
Easily used incorrectly (e.g., incorrectly computing the correct
maximum size to add) (CWE-120). Consider strcat_s, strlcat, or automatically
resizing strings. </i>
<pre>
strncat(d,s,10);
</pre>
<li>test.c:58: <b> [1] </b> (buffer) <i> strlen:
Does not handle strings that are not \0-terminated (it could cause a
crash if unprotected) (CWE-119). </i>
<pre>
n = strlen(d);
</pre>
<li>test.c:64: <b> [1] </b> (buffer) <i> MultiByteToWideChar:
Requires maximum length in CHARACTERS, not bytes (CWE-120). Risk is
very low, the length appears to be in characters not bytes. </i>
<pre>
MultiByteToWideChar(CP_ACP,0,szName,-1,wszUserName,sizeof(wszUserName)/sizeof(wszUserName[0]));
</pre>
<li>test.c:66: <b> [1] </b> (buffer) <i> MultiByteToWideChar:
Requires maximum length in CHARACTERS, not bytes (CWE-120). Risk is
very low, the length appears to be in characters not bytes. </i>
<pre>
MultiByteToWideChar(CP_ACP,0,szName,-1,wszUserName,sizeof wszUserName /sizeof(wszUserName[0]));
</pre>
</ul>
<p>
Hits = 36
<br>
Lines analyzed = 118
<br>
Physical Source Lines of Code (SLOC) = 80
<br>
Hits@level = [0] 0 [1] 9 [2] 7 [3] 3 [4] 10 [5] 7 <br>
Hits@level+ = [0+] 36 [1+] 36 [2+] 27 [3+] 20 [4+] 17 [5+] 7 <br>
Hits/KSLOC@level+ = [0+] 450 [1+] 450 [2+] 337.5 [3+] 250 [4+] 212.5 [5+] 87.5 <br>
Suppressed hits = 2 (use --neverignore to show them)
<br>
Minimum risk level = 1
<br>
Not every hit is necessarily a security vulnerability.
<br>
There may be other security vulnerabilities; review your code!
</body>
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