Vulnerability · Published Feb 10, 2021 · Assigned by zdi
CVE-2020-27874
High 8.8
In plain English
A high-severity memory corruption 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 2.2% (higher than 82% of all known vulnerabilities).
Official description
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Tencent WeChat 7.0.18. 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 memory access past the end of an allocated object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-11580.
Affected products (as reported)
Weakness: CWE-119 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://www.zerodayinitiative.com/advisories/ZDI-21-084/ x_refsource_MISC