Valve Dota up to 7.23 Map schemasystem.dll GetValue code injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Valve Dota up to 7.23. This vulnerability affects the function GetValue in the library schemasystem.dll of the component Map Handler. Executing a manipulation can lead to code injection. This vulnerability is handled as CVE-2020-7949. The attack can be executed remotely. Additionally, an exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Valve Dota up to 7.23. It has been declared as critical. This vulnerability affects the function GetValue in the library schemasystem.dll of the component Map Handler. The manipulation with an unknown input leads to a code injection vulnerability. The CWE definition for the vulnerability is CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

schemasystem.dll in Valve Dota 2 before 7.23f allows remote attackers to achieve code execution or denial of service by creating a gaming server and inviting a victim to this server, because a crafted map is mishandled during a GetValue call.

The weakness was released 01/27/2020. This vulnerability was named CVE-2020-7949 since 01/24/2020. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1059.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept.

Upgrading to version 7.23f eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (48031). Entries connected to this vulnerability are available at VDB-149419, VDB-149418 and VDB-149417. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Valve

Name

• Dota

Version

• 7.0
• 7.1
• 7.2
• 7.3
• 7.4
• 7.5
• 7.6
• 7.7
• 7.8
• 7.9
• 7.10
• 7.11
• 7.12
• 7.13
• 7.14
• 7.15
• 7.16
• 7.17
• 7.18
• 7.19
• 7.20
• 7.21
• 7.22
• 7.23

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

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Timelineinfo

Sourcesinfo

Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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