Vulnerability · Published Apr 14, 2021 · Assigned by zdi
CVE-2021-27247
Medium 6.5
In plain English
A medium-severity out-of-bounds read in WeChat from Tencent. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 6.7% (higher than 94% of all known vulnerabilities).
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.
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
References
- https://www.zerodayinitiative.com/advisories/ZDI-21-217/ x_refsource_MISC