CVE-2024-5739 Cross-site scripting in LINE client for iOS
Attacker can execute arbitrary JavaScript in the LINE iOS in-app browser to steal session data or alter content via a malicious iframe.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-5739?
CVE-2024-5739 is a medium-severity cross-site scripting vulnerability in Linecorp Line, published on 12 Jun 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The in-app browser of LINE client for iOS versions below 14.9.0 contains a Universal XSS (UXSS) vulnerability. This vulnerability allows for cross-site scripting (XSS) where arbitrary JavaScript can be executed in the top frame from an embedded iframe on any displayed web site within the in-app browser. The in-app browser is usually opened by tapping on URLs contained in chat messages, and for the attack to be successful, the victim must trigger a click event on a malicious iframe. If an iframe embedded in any website can be controlled by an attacker, this vulnerability could be exploited to capture or alter content displayed in the top frame, as well as user session information. This vulnerability affects LINE client for iOS versions below 14.9.0 and does not affect other LINE clients such as LINE client for Android. Please update LINE client for iOS to version 14.9.0 or higher.
Weakness: CWE-79
Which versions are affected by CVE-2024-5739?
It affects 1 product.
Products include Linecorp Line.
How do I fix CVE-2024-5739?
No fix has been published for CVE-2024-5739 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2024-5739 being exploited?
There is no known exploitation of CVE-2024-5739 in the wild and no public exploit code.
Other vulnerabilities in Linecorp Line
Sources
Also known as GHSA-9hrm-g973-phrr.