CVE-2021-3777: Other (NVD-CWE-Other)
value: nodejs-tmpl is vulnerable to Inefficient Regular Expression Complexity
CWE description: NVD is only using a subset of CWE for mapping instead of the entire CWE, and the weakness type is not covered by that subset.
CVSS v3 base score: 7.5
Published: 2021-09-15T08:15Z
Repository: https://github.com/daaku/nodejs-tmpl
Language: Other
Files changed: .gitignore, .npmignore, .travis.yml, lib/tmpl.js, license, package.json, readme.md, test/tmpl-test.js
Commit date: 2021-09-07 10:41:07 +0400
Commit message: fix potential dos in regex

Diff: diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..50811db
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+/.tags
+/lib-cov/
+/node_modules/
+/npm-debug.log
+/package-lock.json
diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..417399d
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,8 @@
+.gitignore
+.npmignore
+.tags
+.travis.yml
+lib-cov/
+node_modules/
+npm-debug.log
+test/
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..2d26206
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,3 @@
+language: node_js
+node_js:
+  - 0.6
diff --git a/lib/tmpl.js b/lib/tmpl.js
new file mode 100644
index 0000000..63ed9b2
--- /dev/null
+++ b/lib/tmpl.js
@@ -0,0 +1,17 @@
+var INTERPOLATE = /{([^{]+?)}/g
+
+module.exports = function(str, data) {
+  var tmpl = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' +
+    'with(obj||{}){__p.push(\'' +
+    str.replace(/\\/g, '\\\\')
+       .replace(/'/g, "\\'")
+       .replace(INTERPOLATE, function(match, code) {
+         return "'," + code.replace(/\\'/g, "'") + ",'"
+       })
+       .replace(/\r/g, '\\r')
+       .replace(/\n/g, '\\n')
+       .replace(/\t/g, '\\t')
+       + "');}return __p.join('');"
+  var func = new Function('obj', tmpl)
+  return data ? func(data) : func
+}
diff --git a/license b/license
new file mode 100644
index 0000000..39ae386
--- /dev/null
+++ b/license
@@ -0,0 +1,28 @@
+BSD License
+
+Copyright (c) 2014, Naitik Shah. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+ * Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+ * Neither the name Naitik Shah nor the names of its contributors may be used to
+   endorse or promote products derived from this software without specific
+   prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..3236604
--- /dev/null
+++ b/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "tmpl",
+  "description": "JavaScript micro templates.",
+  "version": "1.0.4",
+  "license": "BSD-3-Clause",
+  "homepage": "https://github.com/daaku/nodejs-tmpl",
+  "author": "Naitik Shah <n@daaku.org>",
+  "main": "lib/tmpl",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/daaku/nodejs-tmpl"
+  },
+  "scripts": {
+    "test": "NODE_PATH=./lib mocha --ui exports"
+  },
+  "devDependencies": {
+    "mocha": "^9.1.1"
+  }
+}
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..61cc2f6
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,10 @@
+tmpl [![Build Status](https://secure.travis-ci.org/nshah/nodejs-tmpl.png)](http://travis-ci.org/nshah/nodejs-tmpl)
+====
+
+Simple string formatting using `{}`.
+
+```javascript
+assert.equal(
+  tmpl('the answer is {answer}', { answer: 42 }),
+  'the answer is 42')
+```
diff --git a/test/tmpl-test.js b/test/tmpl-test.js
new file mode 100644
index 0000000..42dbfe3
--- /dev/null
+++ b/test/tmpl-test.js
@@ -0,0 +1,8 @@
+var tmpl = require('../lib/tmpl')
+  , assert = require('assert')
+
+exports['basic name substitution'] = function() {
+  assert.equal(
+    tmpl('the answer is {answer}', { answer: 42 }),
+    'the answer is 42')
+}

Fixed code: /.tags
/lib-cov/
/node_modules/
/npm-debug.log
/package-lock.json
.gitignore
.npmignore
.tags
.travis.yml
lib-cov/
node_modules/
npm-debug.log
test/
language: node_js
node_js:
  - 0.6
var INTERPOLATE = /{([^{]+?)}/g

module.exports = function(str, data) {
  var tmpl = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' +
    'with(obj||{}){__p.push(\'' +
    str.replace(/\\/g, '\\\\')
       .replace(/'/g, "\\'")
       .replace(INTERPOLATE, function(match, code) {
         return "'," + code.replace(/\\'/g, "'") + ",'"
       })
       .replace(/\r/g, '\\r')
       .replace(/\n/g, '\\n')
       .replace(/\t/g, '\\t')
       + "');}return __p.join('');"
  var func = new Function('obj', tmpl)
  return data ? func(data) : func
}
BSD License

Copyright (c) 2014, Naitik Shah. All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither the name Naitik Shah nor the names of its contributors may be used to
   endorse or promote products derived from this software without specific
   prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
{
  "name": "tmpl",
  "description": "JavaScript micro templates.",
  "version": "1.0.4",
  "license": "BSD-3-Clause",
  "homepage": "https://github.com/daaku/nodejs-tmpl",
  "author": "Naitik Shah <n@daaku.org>",
  "main": "lib/tmpl",
  "repository": {
    "type": "git",
    "url": "https://github.com/daaku/nodejs-tmpl"
  },
  "scripts": {
    "test": "NODE_PATH=./lib mocha --ui exports"
  },
  "devDependencies": {
    "mocha": "^9.1.1"
  }
}
tmpl [![Build Status](https://secure.travis-ci.org/nshah/nodejs-tmpl.png)](http://travis-ci.org/nshah/nodejs-tmpl)
====

Simple string formatting using `{}`.

```javascript
assert.equal(
  tmpl('the answer is {answer}', { answer: 42 }),
  'the answer is 42')
```
var tmpl = require('../lib/tmpl')
  , assert = require('assert')

exports['basic name substitution'] = function() {
  assert.equal(
    tmpl('the answer is {answer}', { answer: 42 }),
    'the answer is 42')
}