What is the severity of ZDI-21-217?

The severity of ZDI-21-217 is classified as a medium risk due to the requirement of user interaction for exploitation.

How do I fix ZDI-21-217?

To fix ZDI-21-217, update Tencent WeChat to the latest available version that addresses this vulnerability.

What type of information can be disclosed due to ZDI-21-217?

ZDI-21-217 can lead to the disclosure of sensitive information from affected installations of Tencent WeChat.

Is user interaction required for ZDI-21-217 exploitation?

Yes, user interaction is required for ZDI-21-217 as the target must visit a malicious page or open a malicious file.

Which software is affected by ZDI-21-217?

ZDI-21-217 affects Tencent WeChat installations that have not been updated to patch the vulnerability.

Vulnerability/
ZDI-21-217

medium

6.5

3/8/2024

ZDI-21-217: Tencent WeChat WXAM Decoder Out-Of-Bounds Read Information Disclosure Vulnerability

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Tencent WeChat. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the WXAM decoder. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process.

Affected Software	Affected Version	How to fix
Tencent Wechat

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Reference Links

https://www.zerodayinitiative.com/advisories/ZDI-21-217/

Frequently Asked Questions

What is the severity of ZDI-21-217?
The severity of ZDI-21-217 is classified as a medium risk due to the requirement of user interaction for exploitation.
How do I fix ZDI-21-217?
To fix ZDI-21-217, update Tencent WeChat to the latest available version that addresses this vulnerability.
What type of information can be disclosed due to ZDI-21-217?
ZDI-21-217 can lead to the disclosure of sensitive information from affected installations of Tencent WeChat.
Is user interaction required for ZDI-21-217 exploitation?
Yes, user interaction is required for ZDI-21-217 as the target must visit a malicious page or open a malicious file.
Which software is affected by ZDI-21-217?
ZDI-21-217 affects Tencent WeChat installations that have not been updated to patch the vulnerability.

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alias/ZDI-CAN-11907
alias/CVE-2021-27247
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canonical/tencent wechat

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