CVE-2020-17448 : Security Advisory and Response
Learn about CVE-2020-17448, a vulnerability in Telegram Desktop allowing spoofed file types to bypass security mechanisms. Find out how to mitigate the risk and apply necessary patches.
Telegram Desktop through 2.1.13 allows a spoofed file type to bypass the Dangerous File Type Execution protection mechanism, as demonstrated by use of the chat window with a filename that lacks an extension.
Understanding CVE-2020-17448
This CVE entry describes a vulnerability in Telegram Desktop that could allow a spoofed file type to evade security mechanisms.
What is CVE-2020-17448?
CVE-2020-17448 is a security vulnerability in Telegram Desktop versions up to 2.1.13 that enables a malicious actor to bypass the Dangerous File Type Execution protection.
The Impact of CVE-2020-17448
The vulnerability allows an attacker to deceive the system by using a chat window with a file name lacking an extension, potentially leading to the execution of dangerous files.
Technical Details of CVE-2020-17448
Telegram Desktop through version 2.1.13 is susceptible to a file type spoofing vulnerability.
Vulnerability Description
The flaw permits a malicious actor to trick the system into executing files with dangerous content by using a chat window with a filename that appears harmless due to the lack of an extension.
Affected Systems and Versions
- Product: Telegram Desktop
- Vendor: N/A
- Versions affected: Up to 2.1.13
Exploitation Mechanism
The vulnerability can be exploited by an attacker who crafts a file with a deceptive name lacking an extension, fooling the system into executing it as a safe file.
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial to mitigating the risks associated with CVE-2020-17448.
Immediate Steps to Take
- Avoid opening files from untrusted sources or with suspicious filenames lacking extensions.
- Update Telegram Desktop to the latest version to patch the vulnerability.
Long-Term Security Practices
- Regularly update software and applications to ensure the latest security patches are in place.
- Educate users on safe file handling practices to prevent falling victim to similar spoofing attacks.
Patching and Updates
- Users should update Telegram Desktop to version 2.2.0 or later to address the vulnerability and enhance system security.