Vulnerability Details CVE-2018-20436
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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 64.3%
CVSS Severity
CVSS v3 Score 8.1
CVSS v2 Score 6.8
References
- https://misteralfa-hack.blogspot.com/2018/12/abusando-de-telegram-para-conseguir-una.html
- https://misteralfa-hack.blogspot.com/2018/12/telegram-siempre-in-middle.html
- https://misteralfa-hack.blogspot.com/2018/12/abusando-de-telegram-para-conseguir-una.html
- https://misteralfa-hack.blogspot.com/2018/12/telegram-siempre-in-middle.html