#VU10469 Spoofing attack in Telegram Desktop for Windows
Published: February 13, 2018
Vulnerability identifier: #VU10469
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:A/U:Green
CVE-ID: N/A
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Telegram Desktop for Windows
Telegram Desktop for Windows
Software vendor:
Telegram
Telegram
Description
The 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.
Remediation
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.
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.