#VU23858 Command Injection in WeChat - CVE-2019-17151

Vulnerability identifier: #VU23858

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-17151

CWE-ID: CWE-77

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WeChat
Client/Desktop applications / Messaging software

Vendor: Tencent

Description

The vulnerability allows a remote attacker to execute arbitrary commands on the target system.

The vulnerability exists due to a lack of input validation within the parsing of a usernames . A remote attacker who is within a chat session together with the victim can execute arbitrary code in the context of the current process.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WeChat: 7.0.0 - 7.0.7

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External links
https://www.zerodayinitiative.com/advisories/ZDI-19-1035/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.