mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-11-24 08:57:03 -05:00
542281ab9f
- Fixes an XSS that was introduced in
https://codeberg.org/forgejo/forgejo/pulls/1433
- This XSS allows for `href`s in anchor elements to be set to a
`javascript:` uri in the repository description, which would upon
clicking (and not upon loading) the anchor element execute the specified
javascript in that uri.
- [`AllowStandardURLs`](https://pkg.go.dev/github.com/microcosm-cc/bluemonday#Policy.AllowStandardURLs) is now called for the repository description
policy, which ensures that URIs in anchor elements are `mailto:`,
`http://` or `https://` and thereby disallowing the `javascript:` URI.
It also now allows non-relative links and sets `rel="nofollow"` on
anchor elements.
- Unit test added.
(cherry picked from commit bb448f3dc2)
108 lines
5.5 KiB
Go
108 lines
5.5 KiB
Go
// Copyright 2017 The Gitea Authors. All rights reserved.
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// Copyright 2017 The Gogs Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package markup
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import (
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"html/template"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func Test_Sanitizer(t *testing.T) {
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NewSanitizer()
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testCases := []string{
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// Regular
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`<a onblur="alert(secret)" href="http://www.google.com">Google</a>`, `<a href="http://www.google.com" rel="nofollow">Google</a>`,
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// Code highlighting class
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`<code class="random string"></code>`, `<code></code>`,
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`<code class="language-random ui tab active menu attached animating sidebar following bar center"></code>`, `<code></code>`,
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`<code class="language-go"></code>`, `<code class="language-go"></code>`,
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// Input checkbox
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`<input type="hidden">`, ``,
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`<input type="checkbox">`, `<input type="checkbox">`,
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`<input checked disabled autofocus>`, `<input checked="" disabled="">`,
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// Code highlight injection
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`<code class="language-random ui tab active menu attached animating sidebar following bar center"></code>`, `<code></code>`,
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`<code class="language-lol ui tab active menu attached animating sidebar following bar center">
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<code class="language-lol ui container input huge basic segment center"> </code>
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<img src="https://try.gogs.io/img/favicon.png" width="200" height="200">
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<code class="language-lol ui container input massive basic segment">Hello there! Something has gone wrong, we are working on it.</code>
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<code class="language-lol ui container input huge basic segment">In the meantime, play a game with us at <a href="http://example.com/">example.com</a>.</code>
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</code>`, "<code>\n<code>\u00a0</code>\n<img src=\"https://try.gogs.io/img/favicon.png\" width=\"200\" height=\"200\">\n<code>Hello there! Something has gone wrong, we are working on it.</code>\n<code>In the meantime, play a game with us at\u00a0<a href=\"http://example.com/\" rel=\"nofollow\">example.com</a>.</code>\n</code>",
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// <kbd> tags
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`<kbd>Ctrl + C</kbd>`, `<kbd>Ctrl + C</kbd>`,
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`<i class="dropdown icon">NAUGHTY</i>`, `<i>NAUGHTY</i>`,
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`<i class="icon dropdown"></i>`, `<i class="icon dropdown"></i>`,
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`<input type="checkbox" disabled=""/>unchecked`, `<input type="checkbox" disabled=""/>unchecked`,
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`<span class="emoji dropdown">NAUGHTY</span>`, `<span>NAUGHTY</span>`,
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`<span class="emoji">contents</span>`, `<span class="emoji">contents</span>`,
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// Color property
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`<span style="color: red">Hello World</span>`, `<span style="color: red">Hello World</span>`,
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`<p style="color: red">Hello World</p>`, `<p style="color: red">Hello World</p>`,
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`<code style="color: red">Hello World</code>`, `<code>Hello World</code>`,
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`<span style="bad-color: red">Hello World</span>`, `<span>Hello World</span>`,
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`<p style="bad-color: red">Hello World</p>`, `<p>Hello World</p>`,
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`<code style="bad-color: red">Hello World</code>`, `<code>Hello World</code>`,
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// Org mode status of list items.
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`<li class="checked"></li>`, `<li class="checked"></li>`,
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`<li class="unchecked"></li>`, `<li class="unchecked"></li>`,
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`<li class="indeterminate"></li>`, `<li class="indeterminate"></li>`,
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// URLs
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`<a href="cbthunderlink://somebase64string)">my custom URL scheme</a>`, `<a href="cbthunderlink://somebase64string)" rel="nofollow">my custom URL scheme</a>`,
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`<a href="matrix:roomid/psumPMeAfzgAeQpXMG:feneas.org?action=join">my custom URL scheme</a>`, `<a href="matrix:roomid/psumPMeAfzgAeQpXMG:feneas.org?action=join" rel="nofollow">my custom URL scheme</a>`,
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// Disallow dangerous url schemes
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`<a href="javascript:alert('xss')">bad</a>`, `bad`,
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`<a href="vbscript:no">bad</a>`, `bad`,
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`<a href="data:1234">bad</a>`, `bad`,
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}
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for i := 0; i < len(testCases); i += 2 {
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assert.Equal(t, testCases[i+1], Sanitize(testCases[i]))
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}
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}
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func TestDescriptionSanitizer(t *testing.T) {
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NewSanitizer()
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testCases := []string{
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`<h1>Title</h1>`, `Title`,
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`<img src='img.png' alt='image'>`, ``,
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`<span class="emoji" aria-label="thumbs up">THUMBS UP</span>`, `<span class="emoji" aria-label="thumbs up">THUMBS UP</span>`,
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`<span style="color: red">Hello World</span>`, `<span>Hello World</span>`,
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`<br>`, ``,
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`<a href="https://example.com" target="_blank" rel="noopener noreferrer">https://example.com</a>`, `<a href="https://example.com" target="_blank" rel="noopener noreferrer nofollow">https://example.com</a>`,
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`<mark>Important!</mark>`, `Important!`,
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`<details>Click me! <summary>Nothing to see here.</summary></details>`, `Click me! Nothing to see here.`,
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`<input type="hidden">`, ``,
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`<b>I</b> have a <i>strong</i> <strong>opinion</strong> about <em>this</em>.`, `<b>I</b> have a <i>strong</i> <strong>opinion</strong> about <em>this</em>.`,
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`Provides alternative <code>wg(8)</code> tool`, `Provides alternative <code>wg(8)</code> tool`,
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`<a href="javascript:alert('xss')">Click me</a>.`, `Click me.`,
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`<a href="data:text/html,<script>alert('xss')</script>">Click me</a>.`, `Click me.`,
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`<a href="vbscript:msgbox("xss")">Click me</a>.`, `Click me.`,
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}
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for i := 0; i < len(testCases); i += 2 {
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assert.Equal(t, testCases[i+1], SanitizeDescription(testCases[i]))
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}
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}
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func TestSanitizeNonEscape(t *testing.T) {
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descStr := "<scrİpt><script>alert(document.domain)</script></scrİpt>"
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output := template.HTML(Sanitize(descStr))
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if strings.Contains(string(output), "<script>") {
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t.Errorf("un-escaped <script> in output: %q", output)
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}
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}
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