Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE ID | N/A |
CWE ID | CWE-451 |
Exploitation vector | Network |
Public exploit | This vulnerability is being exploited in the wild. |
Vulnerable software Subscribe |
Telegram Desktop for Windows Client/Desktop applications / Messaging software |
Vendor | Telegram |
This security advisory describes one medium risk vulnerability.
Risk: Medium
CVSSv3: 5.6 [CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L/E:H/RL:O/RC:C] [PCI]
CVE-ID: N/A
CWE-ID:
CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to improper parsing of right-to-left override (RLO) character when processing names of the transmitted files in Telegram Desktop for Windows. A remote attacker can create a specially crafted filename with malicious content (e.g. a JavaScript file), disguise it as an image and trick the victim into opening it.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Note: this vulnerability has been exploited in the wild since March until October in 2017, according to Kaspersky Lab and was silently fixed by the vendor.
Update to the latest version. The vulnerability was reported to vendor in October 2017 and fixed afterwards.
It is unclear, in which version this vulnerability was fixed, however according to Kaspersky Lab statement and commits to the official GitHub repository, version 1.1.23 should be vulnerable to this issue.
Telegram Desktop for Windows: 1.1.23
CPE External linkshttps://securelist.com/zero-day-vulnerability-in-telegram/83800/
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.