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/uim-chewing-0.1.0/src/chewing.c Examining data/uim-chewing-0.1.0/src/keytab.h FINAL RESULTS: data/uim-chewing-0.1.0/src/chewing.c:109:10: [3] (buffer) getenv: Environment variables are untrustable input if they can be set by an attacker. They can have any content and length, and the same variable can be set more than once (CWE-807, CWE-20). Check environment variables carefully before using them. home = getenv("HOME"); data/uim-chewing-0.1.0/src/chewing.c:273:9: [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 mb[MB_CUR_MAX]; data/uim-chewing-0.1.0/src/chewing.c:328:7: [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 mb[MB_CUR_MAX]; data/uim-chewing-0.1.0/src/chewing.c:113:9: [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(home) + strlen("/.chewing/"); data/uim-chewing-0.1.0/src/chewing.c:113:24: [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). len = strlen(home) + strlen("/.chewing/"); data/uim-chewing-0.1.0/src/chewing.c:278:9: [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(buf, mb, len); data/uim-chewing-0.1.0/src/chewing.c:287:24: [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). preedit_len += strlen(buf); data/uim-chewing-0.1.0/src/chewing.c:342:2: [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(buf, mb, len); data/uim-chewing-0.1.0/src/chewing.c:351:22: [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). preedit_len += strlen(buf); data/uim-chewing-0.1.0/src/chewing.c:395:5: [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(buf, "; ", 2); data/uim-chewing-0.1.0/src/chewing.c:396:5: [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(buf, str, len); data/uim-chewing-0.1.0/src/chewing.c:404:20: [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). preedit_len += strlen(buf); ANALYSIS SUMMARY: Hits = 12 Lines analyzed = 1128 in approximately 0.07 seconds (17156 lines/second) Physical Source Lines of Code (SLOC) = 895 Hits@level = [0] 1 [1] 9 [2] 2 [3] 1 [4] 0 [5] 0 Hits@level+ = [0+] 13 [1+] 12 [2+] 3 [3+] 1 [4+] 0 [5+] 0 Hits/KSLOC@level+ = [0+] 14.5251 [1+] 13.4078 [2+] 3.35196 [3+] 1.11732 [4+] 0 [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.