44
55| Version | Supported |
66| ------- | ------------------ |
7+ | 1.1.x | :white_check_mark : |
78| 1.0.x | :white_check_mark : |
89
10+ ## Security Features
11+
12+ CompressKit implements the following security features:
13+
14+ - ** Path Traversal Protection** : All file paths are validated using the ` safe_path() ` function to prevent directory traversal attacks.
15+ - ** Command Execution Protection** : Commands are executed only through ` safe_execute() ` with a strict allowlist of permitted commands.
16+ - ** Input Validation** : All user inputs are validated using dedicated validation functions.
17+ - ** Secure File Operations** : All file operations follow secure permissions and include validation.
18+ - ** Secure Temporary Files** : Temporary files are created with secure permissions in isolated locations.
19+ - ** Error Handling** : Consistent error handling prevents information leakage.
20+ - ** Security Incident Reporting** : Security incidents are logged and reported to administrators.
21+
22+ ## Recent Security Improvements
23+
24+ - Fixed critical issue in ` safe_path() ` function that could lead to path traversal vulnerabilities
25+ - Implemented comprehensive security module with improved validation
26+ - Enhanced test coverage for security-critical functions
27+ - Added protection against command injection and URL-encoded path attacks
28+
929## Reporting a Vulnerability
1030
1131If you discover a security vulnerability, please:
@@ -16,4 +36,148 @@ If you discover a security vulnerability, please:
16364 . Allow up to 48 hours for initial response
17375 . Please keep the vulnerability private until patched
1838
39+ ## Security Guidelines for Developers
40+
41+ When contributing to CompressKit:
42+
43+ 1 . ** Always** use ` safe_path() ` for file path validation
44+ 2 . ** Always** use ` safe_execute() ` for command execution
45+ 3 . ** Always** validate all user inputs
46+ 4 . ** Always** use secure permissions for files containing sensitive information
47+ 5 . ** Always** implement proper error handling
48+ 6 . ** Never** use ` eval ` or direct command execution
49+ 7 . ** Never** concatenate user input into paths without validation
50+
1951Thank you for helping keep CompressKit secure!
52+
53+ ## Implementation Examples
54+
55+ ### Path Validation with safe_path()
56+
57+ ``` bash
58+ # INCORRECT - vulnerable to path traversal
59+ process_file () {
60+ local input_file=" $1 "
61+ cat " $input_file " > output.txt # VULNERABLE!
62+ }
63+
64+ # CORRECT - uses safe_path() to validate
65+ process_file_secure () {
66+ local input_file=" $1 "
67+ local safe_file
68+
69+ safe_file=$( safe_path " $input_file " )
70+ if [ $? -ne 0 ] || [ -z " $safe_file " ; then
71+ log_error " Invalid file path"
72+ return 1
73+ fi
74+
75+ cat " $safe_file " > output.txt
76+ }
77+ ```
78+
79+ ### Command Execution with safe_execute()
80+
81+ ``` bash
82+ # INCORRECT - vulnerable to command injection
83+ run_command () {
84+ local cmd=" $1 "
85+ eval " $cmd " # VULNERABLE!
86+ }
87+
88+ # CORRECT - uses safe_execute() with allowlisting
89+ run_command_secure () {
90+ local cmd=" $1 "
91+ safe_execute " $cmd "
92+ }
93+ ```
94+
95+ ### Input Validation
96+
97+ ``` bash
98+ # INCORRECT - no input validation
99+ set_compression_level () {
100+ COMPRESSION_LEVEL=" $1 " # VULNERABLE!
101+ }
102+
103+ # CORRECT - with validation
104+ set_compression_level_secure () {
105+ local level=" $1 "
106+
107+ # Validate input is a number in valid range
108+ if [[ ! " $level " =~ ^[0-9]+$ ]] || [ " $level " -lt 1 ] || [ " $level " -gt 9 ]; then
109+ log_error " Invalid compression level: $level (must be 1-9)"
110+ return 1
111+ fi
112+
113+ COMPRESSION_LEVEL=" $level "
114+ }
115+ ```
116+
117+ ### Secure File Operations
118+
119+ ``` bash
120+ # INCORRECT - insecure file creation
121+ create_config () {
122+ echo " setting=value" > config.txt # VULNERABLE!
123+ }
124+
125+ # CORRECT - secure file creation with proper permissions
126+ create_config_secure () {
127+ local config_file
128+ config_file=$( safe_path " ${HOME} /.config/compresskit/config.txt" )
129+
130+ if [ $? -ne 0 ] || [ -z " $config_file " ; then
131+ log_error " Invalid config file path"
132+ return 1
133+ fi
134+
135+ # Create directory with secure permissions if needed
136+ local config_dir=$( dirname " $config_file " )
137+ if [ ! -d " $config_dir " ; then
138+ mkdir -p " $config_dir " || {
139+ log_error " Failed to create config directory"
140+ return 1
141+ }
142+ chmod 700 " $config_dir "
143+ fi
144+
145+ # Write file with secure permissions
146+ echo " setting=value" > " $config_file "
147+ chmod 600 " $config_file "
148+ }
149+ ```
150+
151+ ### Error Handling
152+
153+ ``` bash
154+ # INCORRECT - poor error handling
155+ compress_file () {
156+ gzip -9 " $1 " # VULNERABLE!
157+ }
158+
159+ # CORRECT - with proper error handling
160+ compress_file_secure () {
161+ local input_file=" $1 "
162+ local safe_file
163+
164+ safe_file=$( safe_path " $input_file " )
165+ if [ $? -ne 0 ] || [ -z " $safe_file " ; then
166+ log_error " Invalid input file path"
167+ return 1
168+ fi
169+
170+ if [ ! -f " $safe_file " ; then
171+ log_error " Input file does not exist: $safe_file "
172+ return 1
173+ fi
174+
175+ if ! gzip -9 " $safe_file " ; then
176+ log_error " Compression failed for: $safe_file "
177+ return 1
178+ fi
179+
180+ log_info " Successfully compressed: $safe_file "
181+ return 0
182+ }
183+ ```
0 commit comments