High severity · published Feb 10, 2021
CVE-2020-27874
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Tencent WeChat 7.0.18
8.8
CVSS
2.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.1% · higher than 81% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
Wechat · Tencent
7.0.18 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27874
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27874
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-084/
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