Some new vulns shortname by felickz · Pull Request #11 · advanced-security/sample-javascript-monorepo · GitHub
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Some new vulns shortname#11

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Some new vulns shortname#11
felickz wants to merge 9 commits into
mainfrom
some-new-vulns-shortname

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@felickz

@felickz felickz commented Mar 13, 2025 •
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Filter not working correctly

https://github.com/advanced-security/sample-javascript-monorepo/security/code-scanning?query=is%3Aopen+pr%3A11+tag%3Aproject%2Fcli

image

tags are applied appropriately

image

image

gh api "repos/advanced-security/sample-javascript-monorepo/code-scanning/alerts?ref=refs/pull/11/merge" --jq '.[] | {html_url: .html_url, rule_tags: .rule.tags}'
{
  "html_url": "https://github.com/advanced-security/sample-javascript-monorepo/security/code-scanning/13",
  "rule_tags": [
    "external/cwe/cwe-338",
    "project/helpers",
    "security"
  ]
}
{
  "html_url": "https://github.com/advanced-security/sample-javascript-monorepo/security/code-scanning/12",
  "rule_tags": [
    "external/cwe/cwe-338",
    "project/cli",
    "security"
  ]
}

@github-advanced-security

github-advanced-security AI commented Mar 13, 2025

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github-advanced-security[bot]
github-advanced-security AI found potential problems Mar 13, 2025
View reviewed changes
Comment thread packages/babel-cli/src/babel/dir.ts
function insecurePassword(): string {
// BAD: the random suffix is not cryptographically secure
const suffix = Math.random();
const password = "myPassword" + suffix;

Check failure

Code scanning / CodeQL

Insecure randomness

This uses a cryptographically insecure random number generated at [Math.random()](1) in a security context.

Copilot Autofix

AI over 1 year ago

To fix the problem, we need to replace the use of Math.random() with a cryptographically secure random number generator. In Node.js, we can use the crypto module's randomBytes function to generate a secure random suffix. This will ensure that the generated password is not easily predictable.

  • Import the crypto module at the beginning of the file.
  • Replace the Math.random() call with crypto.randomBytes to generate a secure random suffix.
  • Convert the random bytes to a suitable format for appending to the password string.
Suggested changeset 1
packages/babel-cli/src/babel/dir.ts

Autofix patch

Autofix patch
Run the following command in your local git repository to apply this patch
cat << 'EOF' | git apply
diff --git a/packages/babel-cli/src/babel/dir.ts b/packages/babel-cli/src/babel/dir.ts
--- a/packages/babel-cli/src/babel/dir.ts
+++ b/packages/babel-cli/src/babel/dir.ts
@@ -3,2 +3,3 @@
 import fs from "fs";
+import crypto from "crypto";
 
@@ -21,4 +22,4 @@
 function insecurePassword(): string {
-  // BAD: the random suffix is not cryptographically secure
-  const suffix = Math.random();
+  // GOOD: the random suffix is cryptographically secure
+  const suffix = crypto.randomBytes(4).toString('hex');
   const password = "myPassword" + suffix;
EOF
@@ -3,2 +3,3 @@
import fs from "fs";
import crypto from "crypto";

@@ -21,4 +22,4 @@
function insecurePassword(): string {
// BAD: the random suffix is not cryptographically secure
const suffix = Math.random();
// GOOD: the random suffix is cryptographically secure
const suffix = crypto.randomBytes(4).toString('hex');
const password = "myPassword" + suffix;
Copilot is powered by AI and may make mistakes. Always verify output.
Comment thread packages/babel-helpers/src/index.ts
function insecurePassword(): string {
// BAD: the random suffix is not cryptographically secure
const suffix = Math.random();
const password = "myPassword" + suffix;

Check failure

Code scanning / CodeQL

Insecure randomness

This uses a cryptographically insecure random number generated at [Math.random()](1) in a security context.

Copilot Autofix

AI over 1 year ago

To fix the problem, we need to replace the use of Math.random() with a cryptographically secure random number generator. In a Node.js environment, we can use the crypto module's randomBytes method to generate secure random values. We will convert these bytes to a number to append to the password.

Specifically, we will:

  1. Import the crypto module.
  2. Replace the Math.random() call with a call to crypto.randomBytes.
  3. Convert the random bytes to a number suitable for appending to the password.
Suggested changeset 1
packages/babel-helpers/src/index.ts

Autofix patch

Autofix patch
Run the following command in your local git repository to apply this patch
cat << 'EOF' | git apply
diff --git a/packages/babel-helpers/src/index.ts b/packages/babel-helpers/src/index.ts
--- a/packages/babel-helpers/src/index.ts
+++ b/packages/babel-helpers/src/index.ts
@@ -4,2 +4,3 @@
 import type { HelperMetadata } from "./helpers-generated.ts";
+import { randomBytes } from "crypto";
 
@@ -27,4 +28,4 @@
 function insecurePassword(): string {
-  // BAD: the random suffix is not cryptographically secure
-  const suffix = Math.random();
+  // GOOD: the random suffix is cryptographically secure
+  const suffix = randomBytes(4).readUInt32BE(0);
   const password = "myPassword" + suffix;
EOF
Copilot is powered by AI and may make mistakes. Always verify output.
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@felickz @github-advanced-security