High · published December 15, 2025
🚨 A classic case of bad security checks! The LINE client for iOS before version 15.4 allows man-in-the-middle attacks by disabling SSL/TLS certificate validation—like a bouncer letting anyone into the VIP section without checking their ID. 🔥 Think of it like a bank teller who stops checking IDs at the counter—anyone could just walk in, impersonate someone else, and access sensitive accounts. In this scenario, a crafty attacker could intercept or even alter your private conversations and financial transactions without you even knowing! An attacker with network access could potentially eavesdrop on your conversations or manipulate sensitive data without you noticing. This could lead to unauthorized access to your financial details, putting your privacy at serious risk. It’s not just a breach; it’s an invitation for chaos in your communications! ⚡
Think of it like a bank teller who stops checking IDs at the counter—anyone could just walk in, impersonate someone else, and access sensitive accounts. In this scenario, a crafty attacker could intercept or even alter your private conversations and financial transactions without you even knowing! This vulnerability stems from improper SSL/TLS certificate validation within an integrated financial SDK in the LINE app. The SDK disrupts the app’s ability to verify server certificates, enabling attackers to intercept encrypted traffic.
An attacker with network access could potentially eavesdrop on your conversations or manipulate sensitive data without you noticing. This could lead to unauthorized access to your financial details, putting your privacy at serious risk. It’s not just a breach; it’s an invitation for chaos in your communications! ⚡ To mitigate this risk, immediately update to LINE client version 15.4 or later. Additionally, review the integrated SDK settings to ensure proper SSL/TLS certificate validation is enforced. Regularly check for updates to stay protected! 🛡️ You've got this! Follow these steps and you'll be on your way to keeping your communications safe in no time! 😄
| Product | Versions | Fixed in |
|---|---|---|
| linecorp/line | < 15.4.0 | 15.4.0 |