CVE-2021-27247 Information disclosure in WeChat
Remote attackers can disclose sensitive information via a buffer over-read in the WXAM decoder, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-27247?
CVE-2021-27247 is a medium-severity vulnerability in Tencent WeChat, published on 14 Apr 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-125
Which versions are affected by CVE-2021-27247?
It affects 1 product.
Products include Tencent Wechat.
How do I fix CVE-2021-27247?
No fix has been published for CVE-2021-27247 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-27247 being exploited?
There is no known exploitation of CVE-2021-27247 in the wild and no public exploit code.
Other vulnerabilities in Tencent WeChat
Sources
Also known as GHSA-32ww-65cv-cvf4.