CVE-2018-1000815

Brave Software Inc. Brave version version 0.22.810 to 0.24.0 contains a Other/Unknown vulnerability in function ContentSettingsObserver::AllowScript in contentsettingsobserver.cc that can result in Websites can run inline JavaScript even if script is blocked, making attackers easier to track user...

Improper access control

Brave Software Inc. Brave version version 0.22.810 to 0.24.0 contains a Other/Unknown vulnerability in function ContentSettingsObserver::AllowScript in contentsettingsobserver.cc that can result in Websites can run inline JavaScript even if script is blocked, making attackers easier to track user...

CVE-2018-1000815

Brave Software Inc. Brave version version 0.22.810 to 0.24.0 contains a Other/Unknown vulnerability in function ContentSettingsObserver::AllowScript in contentsettingsobserver.cc that can result in Websites can run inline JavaScript even if script is blocked, making attackers easier to track user...

CVE-2018-1000815

Brave Software Inc. Brave version version 0.22.810 to 0.24.0 contains a Other/Unknown vulnerability in function ContentSettingsObserver::AllowScript in contentsettingsobserver.cc that can result in Websites can run inline JavaScript even if script is blocked, making attackers easier to track user...

CVE-2018-1000815

Brave 0.22.810–0.24.0 contains a vulnerability in ContentSettingsObserver::AllowScript() that could allow inline JavaScript to run even when blocked. Impact is user tracking risk when visiting a crafted site. The issue is fixed in Brave 0.25.2. Exploitation details are not provided in the availab...

brave-answer.jp XSS vulnerability

Open Bug Bounty ID: OBB-709383 Description| Value ---|--- Affected Website:| brave-answer.jp Open Bug Bounty Program:| Create your bounty program now. It's open and free. Vulnerable Application:| hidden until disclosure Vulnerability Type:| XSS Cross Site Scripting / CWE-79 CVSSv3 Score:| hidden...

Brave Software: Brave allows flash to follow 307 redirects to other origins with arbitrary content-types

Steps to reproduce: Used https://github.com/sp1d3r/swfjsoncsrf in latest available version of flash to send a post request cross-domain with a non-simple content type. Actual results: The request is sent in firefox. Expected results: The request should either not be sent or the content-type shoul...

Brave Software: Field Day With Protocol Handlers

Summary ===================== When launching a protocol such as mailto:, SEARCH:, or bitcoin:, Brave only asks to allow the protocol to be opened by an external application. You can select on whether or not to remember the decision or not and to allow or deny it. The issue is that upon selecting...

Brave Software: chrome://brave navigation from web

Summary: It's possible to navigate to the infamous 'chrome://brave' and all other privileged page from web, requiring only a single click. This is possible by opening popups with the 'noopener' attribute. Products affected: Brave: 0.24.0 V8: 6.9.427.23 rev: f657f15bf7e0e0c50a2b854c6b05edb59bfc556...

Brave Software: RCE: DnDing shortcut files to chrome://brave allows loading HTML files in Muon's context

Summary: \395737 has shown that Brave supports chrome://brave/ URLs. The Brave team introduced a patch which blocks navigation to chrome://brave and removed chrome.remote.require to prevent command execution on the machine. Navigation to chrome://brave via shortcut files From my understanding: 1...

Brave Software: chrome://brave can still be navigated to, leading to RCE

Summary: 'chrome://brave' can be navigated to using the middle mouse click or normal click with CTRL held IFF coming from a bookmark. I am also using a small bug to actually trick a user into bookmarking our crafted URL through drag and drop. Products affected: Brave: 0.24.0 V8: 6.9.427.23 rev:...

Brave Software: `chrome://brave` available for navigation in Release build [-> RCE] + navigation to `chrome://*` using tab_helper ["Open in new tab"]

Summary: chrome://brave is available for navigation Navigation to chrome://brave + requires local file at . The file loaded in this context has access to private Muon APIs such as chrome.ipcRenderer/remote/webFrame/webViewRequest. Muon API allows executing code on the device. e.g. with...

Brave Software: Local files reading from the "file://" origin through `brave://`

Summary: Sadly, fix for 390013 works only for web. Loading brave:// from the file:// origin allows reading local files on the device. I said that fix could be insufficient 😈 file:// and brave:// both are local origins. That means it's possible to access brave:// from file:// and vice versa...

Brave Software: Local files reading from the web using `brave://`

Summary: brave:// protocol was introduced as a replacement for AsarProtocolHandleror something like that in brave/muon after 375329. However, fix for 375329 introduced a new much severe bug that allows reading files from a user's device from the web. PoC is similar to 375329, but it uses brave://...

brave-answer.jp XSS vulnerability

Open Bug Bounty ID: OBB-649325 Description| Value ---|--- Affected Website:| brave-answer.jp Open Bug Bounty Program:| Create your bounty program now. It's open and free. Vulnerable Application:| Custom Code Vulnerability Type:| XSS Cross Site Scripting / CWE-79 CVSSv3 Score:| 6.1...

Brave Software: Torrent extension: Cross-origin downloading + "URL spoofing" + CSP-blocked XSS

Summary: \378809 allows navigating to chrome-extension:// \378805 allows displaying alert windows on chrome-extension:// origin As I said in 378809, navigation to chrome-extension:// allows attacking dependencies/components of extensions. Brave has only 3 extensions installed by default w\o...

Brave Software: `alert()` dialogs on `chrome-extension://` origin (internal pages)

Summary: Navigation to chrome-extension from the web is possible with 378805 ftp:// - chrome-extension://. A blank page is created during navigation to chrome-extension:// origin. Blank pages have "This page" title. It's possible to initiate alert with a social-engineering content and "This page"...

Brave Software: Navigation to `chrome-extension://` origin (internal pages) from the web

Summary http and https pages are disallowed from navigating to chrome-extension:// origin. However, ftp protocol isn't checked. Pages from ftp:/// and file:/// origin could navigate to chrome-extension:// origin. Steps to reproduce: 1. Start ftp server sample ftp server attached, npm i ftpd && no...

Brave Software: `settingcontent-ms` files lacks "mark of the web" => execute code by dbl click in Downloads toolbar

Summary: settingcontent-ms files allow launching any binary with any params. Brave doesn't mark settingcontent-ms files with "mark of the web", so the file could be executed by double click in "Downloads" toolbar. Launched settingcontent-ms file could lead to code execution with user-level...

A week in security (June 25 – July 1)

Last week on Labs, we looked at comment moderation duties, Viagra spam on a news-making restaurant's website, and how to manage your child's online presence for Internet safety month. We also looked at a set of big breaches and leaks, as well as malware threats with a World Cup vibe. Other news...