Subject: [ASA-202107-45] telegram-desktop: content spoofing

Arch Linux Security Advisory ASA-202107-45
==========================================

Severity: Low
Date    : 2021-07-20
CVE-ID  : CVE-2021-36769
Package : telegram-desktop
Type    : content spoofing
Remote  : Yes
Link    : https://security.archlinux.org/AVG-2170

Summary
=======

The package telegram-desktop before version 2.8.11-1 is vulnerable to
content spoofing.

Resolution
==========

Upgrade to 2.8.11-1.

# pacman -Syu "telegram-desktop>=2.8.11-1"

The problem has been fixed upstream in version 2.8.11.

Workaround
==========

None.

Description
===========

A reordering issue exists in Telegram Desktop before 2.8.8. An attacker
can cause the server to receive messages in a different order than they
were sent by a client.

Impact
======

A man-in-the-middle attacker could reorder the messages sent by a
client, potentially altering the meaning of the conversation.

References
==========

https://mtpsym.github.io/
https://security.archlinux.org/CVE-2021-36769