Vulnerability identifier: #VU24703

Vulnerability risk: High

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-7949

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Dota 2
Client/Desktop applications / Games

Vendor: Valve Software

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack or execute arbitrary code.

The vulnerability exists due to insufficient validation of user-supplied input in the "schemasystem.dll". A remote attacker can create a gaming server, invite a victim to this server, because a crafted map is mishandled during a GetValue call and execute arbitrary code or cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Dota 2: 7.00 - 7.23e

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External links
http://github.com/bi7s/CVE/tree/master/CVE-2020-7949

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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. However, proof of concept for this vulnerability is available.