CVE-2021-27247: 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 2.9.5 desktop version. 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. Was ZDI-CAN-11907.
Other sources
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
Event History
Frequently Asked Questions
What is the vulnerability ID of this Tencent WeChat vulnerability?
The vulnerability ID for this Tencent WeChat vulnerability is CVE-2021-27247.
What is the title of this Tencent WeChat vulnerability?
The title of this Tencent WeChat vulnerability is Tencent WeChat WXAM Decoder Out-Of-Bounds Read Information Disclosure Vulnerability.
What is the severity rating of CVE-2021-27247?
The severity rating of CVE-2021-27247 is medium with a score of 6.5.
How can remote attackers exploit CVE-2021-27247?
Remote attackers can exploit CVE-2021-27247 by tricking the target into visiting a malicious page or opening a malicious file.
What version of Tencent WeChat is affected by CVE-2021-27247?
Tencent WeChat version 2.9.5 is affected by CVE-2021-27247.