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/corkscrew-2.0/acconfig.h
Examining data/corkscrew-2.0/corkscrew.c

FINAL RESULTS:

data/corkscrew-2.0/corkscrew.c:268:6:  [4] (buffer) sscanf:
  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.
					sscanf(buffer,"%s%d%[^\n]",version,&code,descr);
data/corkscrew-2.0/corkscrew.c:44:14:  [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.
const static char base64[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
data/corkscrew-2.0/corkscrew.c:175:2:  [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 uri[BUFSIZE] = "", buffer[BUFSIZE] = "", version[BUFSIZE] = "", descr[BUFSIZE] = "";
data/corkscrew-2.0/corkscrew.c:177:2:  [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 uri[BUFSIZE], buffer[BUFSIZE], version[BUFSIZE], descr[BUFSIZE];
data/corkscrew-2.0/corkscrew.c:202:9:  [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).
			fp = fopen(argv[5], "r");
data/corkscrew-2.0/corkscrew.c:207:5:  [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 line[4096];
data/corkscrew-2.0/corkscrew.c:61:8:  [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(in);
data/corkscrew-2.0/corkscrew.c:65:9:  [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(in);
data/corkscrew-2.0/corkscrew.c:228:2:  [1] (buffer) strncpy:
  Easily used incorrectly; doesn't always \0-terminate or check for invalid
  pointers [MS-banned] (CWE-120). Risk is low because the source is a
  constant string.
	strncpy(uri, "CONNECT ", sizeof(uri));
data/corkscrew-2.0/corkscrew.c:229:2:  [1] (buffer) strncat:
  Easily used incorrectly (e.g., incorrectly computing the correct maximum
  size to add) [MS-banned] (CWE-120). Consider strcat_s, strlcat, snprintf,
  or automatically resizing strings.
	strncat(uri, desthost, sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:229:39:  [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).
	strncat(uri, desthost, sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:230:2:  [1] (buffer) strncat:
  Easily used incorrectly (e.g., incorrectly computing the correct maximum
  size to add) [MS-banned] (CWE-120). Consider strcat_s, strlcat, snprintf,
  or automatically resizing strings. Risk is low because the source is a
  constant character.
	strncat(uri, ":", sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:230:34:  [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).
	strncat(uri, ":", sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:231:2:  [1] (buffer) strncat:
  Easily used incorrectly (e.g., incorrectly computing the correct maximum
  size to add) [MS-banned] (CWE-120). Consider strcat_s, strlcat, snprintf,
  or automatically resizing strings.
	strncat(uri, destport, sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:231:39:  [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).
	strncat(uri, destport, sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:232:2:  [1] (buffer) strncat:
  Easily used incorrectly (e.g., incorrectly computing the correct maximum
  size to add) [MS-banned] (CWE-120). Consider strcat_s, strlcat, snprintf,
  or automatically resizing strings. Risk is low because the source is a
  constant string.
	strncat(uri, " HTTP/1.0", sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:232:42:  [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).
	strncat(uri, " HTTP/1.0", sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:234:3:  [1] (buffer) strncat:
  Easily used incorrectly (e.g., incorrectly computing the correct maximum
  size to add) [MS-banned] (CWE-120). Consider strcat_s, strlcat, snprintf,
  or automatically resizing strings. Risk is low because the source is a
  constant string.
		strncat(uri, "\nProxy-Authorization: Basic ", sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:234:63:  [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).
		strncat(uri, "\nProxy-Authorization: Basic ", sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:235:3:  [1] (buffer) strncat:
  Easily used incorrectly (e.g., incorrectly computing the correct maximum
  size to add) [MS-banned] (CWE-120). Consider strcat_s, strlcat, snprintf,
  or automatically resizing strings.
		strncat(uri, base64_encode(up), sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:235:49:  [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).
		strncat(uri, base64_encode(up), sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:237:2:  [1] (buffer) strncat:
  Easily used incorrectly (e.g., incorrectly computing the correct maximum
  size to add) [MS-banned] (CWE-120). Consider strcat_s, strlcat, snprintf,
  or automatically resizing strings.
	strncat(uri, linefeed, sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:237:39:  [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).
	strncat(uri, linefeed, sizeof(uri) - strlen(uri) - 1);
data/corkscrew-2.0/corkscrew.c:264:11:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
				len = read(csock, buffer, sizeof(buffer));
data/corkscrew-2.0/corkscrew.c:280:24:  [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).
					    write(1, tmp, strlen(tmp));
data/corkscrew-2.0/corkscrew.c:285:29:  [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).
				len = write(csock, uri, strlen(uri));
data/corkscrew-2.0/corkscrew.c:293:11:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
				len = read(csock, buffer, sizeof(buffer));
data/corkscrew-2.0/corkscrew.c:300:11:  [1] (buffer) read:
  Check buffer boundaries if used in a loop including recursive loops
  (CWE-120, CWE-20).
				len = read(0, buffer, sizeof(buffer));

ANALYSIS SUMMARY:

Hits = 28
Lines analyzed = 310 in approximately 0.05 seconds (6480 lines/second)
Physical Source Lines of Code (SLOC) = 271
Hits@level = [0]   7 [1]  22 [2]   5 [3]   0 [4]   1 [5]   0
Hits@level+ = [0+]  35 [1+]  28 [2+]   6 [3+]   1 [4+]   1 [5+]   0
Hits/KSLOC@level+ = [0+] 129.151 [1+] 103.321 [2+] 22.1402 [3+] 3.69004 [4+] 3.69004 [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.