Telegram Desktop (aka tdesktop) 1.3.14 might allow attackers to cause a denial of service (assertion failure and application exit) via an Edit color palette search that triggers an index out of range condition. NOTE: this issue is disputed by multiple third parties because the described attack scenario does not cross a privilege boundary
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Telegram_desktop | Telegram | 1.3.14 (including) | 1.3.14 (including) |
| Telegram-desktop | Ubuntu | bionic | * |
| Telegram-desktop | Ubuntu | groovy | * |
| Telegram-desktop | Ubuntu | hirsute | * |
| Telegram-desktop | Ubuntu | impish | * |
| Telegram-desktop | Ubuntu | kinetic | * |
| Telegram-desktop | Ubuntu | trusty | * |
While assertion is good for catching logic errors and reducing the chances of reaching more serious vulnerability conditions, it can still lead to a denial of service. For example, if a server handles multiple simultaneous connections, and an assert() occurs in one single connection that causes all other connections to be dropped, this is a reachable assertion that leads to a denial of service.