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CVE-2021-47793— Telegram Desktop 2.9.2 - Denial of Service (PoC)

Quick assessment

Affected
Telegram Telegram Desktop
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Telegram Desktop是Telegram开源的一款即时通信移动应用程序的桌面版。 Telegram Desktop 2.9.2版本存在安全漏洞，该漏洞源于发送超大消息有效载荷，可能导致拒绝服务攻击。

CVSS 7.5 · High EPSS 0.51% · P41

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-47793

Vulnerability Information
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Vulnerability Title
Telegram Desktop 2.9.2 - Denial of Service (PoC)
Source: CVE Program / CVE List V5
Vulnerability Description
Telegram Desktop 2.9.2 contains a denial of service vulnerability that allows attackers to crash the application by sending an oversized message payload. Attackers can generate a 9 million byte buffer and paste it into the messaging interface to trigger an application crash.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Telegram Desktop 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Telegram Desktop是Telegram开源的一款即时通信移动应用程序的桌面版。 Telegram Desktop 2.9.2版本存在安全漏洞，该漏洞源于发送超大消息有效载荷，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Telegram Telegram Desktop 2.9.2 -

II. Public POCs for CVE-2021-47793

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III. Intelligence Information for CVE-2021-47793

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Exploits & Public PoCs for CVE-2021-47793 (1)

IV. Related Vulnerabilities

Same product: Telegram Desktop
Same vendor: Telegram
Same weakness: CWE-770

V. Comments for CVE-2021-47793

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