CVE-2023-51219

A deep link validation issue in KakaoTalk 10.4.3 allowed a remote adversary to direct users to run any attacker-controlled JavaScript within a WebView

Critical · published June 3, 2024

CVSS v3.1
9.6
EPSS
1%
Percentile
43.5
In the wild
Unconfirmed
What it is

🚨 A simple click could unleash a world of chaos! A deep link validation issue in KakaoTalk 10.4.3 allows remote attackers to run malicious JavaScript within a vulnerable WebView. 🔥 Think of it like a restaurant that allows diners to order any dish from the menu without checking if the chef is qualified. In this case, a rogue diner (attacker) can redirect users to dangerous requests and leak sensitive information like a chef revealing recipes to unauthorized guests. An attacker could hijack a user's session, accessing chat messages and private data as if they were the user themselves. This could lead to devastating privacy breaches, exposing sensitive conversations and potentially harmful impersonation. The implications are not just personal; they threaten the whole trust foundation of communication on this platform!

Put simply

Think of it like a restaurant that allows diners to order any dish from the menu without checking if the chef is qualified. In this case, a rogue diner (attacker) can redirect users to dangerous requests and leak sensitive information like a chef revealing recipes to unauthorized guests. This vulnerability enables attackers to manipulate deep links in KakaoTalk, which, when clicked, execute arbitrary JavaScript in a WebView. This exploit is further exacerbated by leaking access tokens in HTTP headers, allowing unauthorized account takeovers.

What to do

An attacker could hijack a user's session, accessing chat messages and private data as if they were the user themselves. This could lead to devastating privacy breaches, exposing sensitive conversations and potentially harmful impersonation. The implications are not just personal; they threaten the whole trust foundation of communication on this platform! Update KakaoTalk immediately to version 10.4.4 or later to close this vulnerability. Additionally, review your security settings and educate users about the potential risks of clicking unknown links. Security audits can help catch any lingering issues too! You've got this! Follow these steps, and you'll be back to secure chatting in no time! 🛡️

The record
Technical detail
CVSS v3.1
9.6 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00523 · 43.5th percentile
Published
2024-06-03T00:00Z
EPSS history
Timeline
  • 03 JUN 00:00Z
    A deep link validation issue in KakaoTalk 10.4.3 allowed a remote adversary to direct users to run any attacker-controlled JavaScript within a WebView
    cvelistv5