Remote code execution in Valve Dota 2

1) Buffer overflow

EUVDB-ID: #VU24705

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-2020-7951

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in "meshsystem.dll". A remote attacker can create a gaming server, invite a victim to this server, because a crafted map is affected by memory corruption 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 - 7.23d

CPE2.3

• cpe:2.3:a:valve_software:dota_2:7.00:*:*:*:*:*:*:*
• cpe:2.3:a:valve_software:dota_2:7.01:*:*:*:*:*:*:*
• cpe:2.3:a:valve_software:dota_2:7.02:*:*:*:*:*:*:*

External links

https://github.com/bi7s/CVE/tree/master/CVE-2020-7951

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

Is there known malware, which exploits this vulnerability?

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