CVE Vulnerability

CVE-2018-20436

** DISPUTED ** The "secret chat" feature in Telegram 4.9.1 for Android has a "side channel" in which Telegram servers send GET requests for URLs typed while composing a chat message, before that chat message is sent. There are also GET requests to other URLs on the same web server. This also affects one or more other Telegram products, such as Telegram Web-version 0.7.0. In addition, it can be interpreted as an SSRF issue. NOTE: a third party has reported that potentially unwanted behavior is caused by misconfiguration of the "Secret chats > Preview links" setting.

6.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

8.1 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://misteralfa-hack.blogspot.com/2018/12/telegram-siempre-in-middle.html Exploit Third Party Advisory
https://misteralfa-hack.blogspot.com/2018/12/abusando-de-telegram-para-conseguir-una.html Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:telegram:web:0.7.0:*:*:*:*:*:*:*
cpe:2.3:a:telegram:telegram:4.9.1:*:*:*:*:android:*:*
Information

Published : 2018-12-24 08:29

Updated : 2019-02-14 04:30

NVD link : CVE-2018-20436

Mitre link : CVE-2018-20436

Products Affected
No products.
CWE
CWE-918

Server-Side Request Forgery (SSRF)