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/ruby-narray-0.6.1.2/src/narray.h Examining data/ruby-narray-0.6.1.2/src/na_linalg.c Examining data/ruby-narray-0.6.1.2/src/narray.c Examining data/ruby-narray-0.6.1.2/src/na_func.c Examining data/ruby-narray-0.6.1.2/src/na_random.c Examining data/ruby-narray-0.6.1.2/src/narray_local.h Examining data/ruby-narray-0.6.1.2/src/na_index.c Examining data/ruby-narray-0.6.1.2/src/na_array.c FINAL RESULTS: data/ruby-narray-0.6.1.2/src/narray.c:806:5: [4] (buffer) sprintf: Does not check for buffer overflows (CWE-120). Use sprintf_s, snprintf, or vsnprintf. sprintf(buf, "%s.%s(): []", classname, na_typestring[ary->type]); data/ruby-narray-0.6.1.2/src/narray.c:810:5: [4] (format) sprintf: Potential format string problem (CWE-134). Make format string constant. sprintf(buf, (ary->ref==Qnil) ? org:ref, data/ruby-narray-0.6.1.2/src/na_func.c:1537:3: [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(a2->ptr, a1->ptr, a1->total*na_sizeof[a1->type]); data/ruby-narray-0.6.1.2/src/na_linalg.c:20:3: [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(tmp,a,sz); memcpy(a,b,sz); memcpy(b,tmp,sz); } data/ruby-narray-0.6.1.2/src/na_linalg.c:20:21: [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(tmp,a,sz); memcpy(a,b,sz); memcpy(b,tmp,sz); } data/ruby-narray-0.6.1.2/src/na_linalg.c:20:37: [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(tmp,a,sz); memcpy(a,b,sz); memcpy(b,tmp,sz); } data/ruby-narray-0.6.1.2/src/na_linalg.c:356:7: [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(xi, y+((int32_t*)idx)[i]*sz, sz); data/ruby-narray-0.6.1.2/src/na_linalg.c:531:5: [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(shape,a2->shape+1,sizeof(int)*(ndim-1)); data/ruby-narray-0.6.1.2/src/narray.c:458:3: [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(cpy->ptr, org->ptr, na_sizeof[org->type] * org->total); data/ruby-narray-0.6.1.2/src/narray.c:471:5: [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(dst->ptr, src->ptr, src->total*na_sizeof[src->type]); data/ruby-narray-0.6.1.2/src/narray.c:634:3: [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( ary->ptr, RSTRING_PTR(str), ary->total*na_sizeof[type] ); data/ruby-narray-0.6.1.2/src/narray.c:796:3: [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[256]; data/ruby-narray-0.6.1.2/src/narray.c:814:7: [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(buf,",%i",ary->shape[i]); data/ruby-narray-0.6.1.2/src/narray.c:807:24: [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). rb_str_cat(str,buf,strlen(buf)); data/ruby-narray-0.6.1.2/src/narray.c:812:24: [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). rb_str_cat(str,buf,strlen(buf)); data/ruby-narray-0.6.1.2/src/narray.c:815:26: [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). rb_str_cat(str,buf,strlen(buf)); ANALYSIS SUMMARY: Hits = 16 Lines analyzed = 6141 in approximately 0.15 seconds (41735 lines/second) Physical Source Lines of Code (SLOC) = 4509 Hits@level = [0] 0 [1] 3 [2] 11 [3] 0 [4] 2 [5] 0 Hits@level+ = [0+] 16 [1+] 16 [2+] 13 [3+] 2 [4+] 2 [5+] 0 Hits/KSLOC@level+ = [0+] 3.54846 [1+] 3.54846 [2+] 2.88312 [3+] 0.443557 [4+] 0.443557 [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.