Multiple vulnerabilities in Valve Dota 2
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2020-7952 CVE-2020-7950 CVE-2020-7949 |
| CWE-ID | CWE-119 CWE-20 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #3 is available. |
| Vulnerable software Subscribe |
Dota 2 Client/Desktop applications / Games |
| Vendor | Valve Software |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Buffer overflow
EUVDB-ID: #VU24706
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-7952
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe 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 "rendersystemdx9.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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsDota 2: 7.00 - 7.23e
External linkshttp://github.com/bi7s/CVE/tree/master/CVE-2020-7952
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.
2) Input validation error
EUVDB-ID: #VU24704
Risk: High
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-7950
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe 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 "meshsystem.dll". A remote attacker can create a gaming server, invite a victim to this server, because a crafted map is mishandled during a vulnerable function call and execute arbitrary code or cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsDota 2: 7.00 - 7.23e
External linkshttp://github.com/bi7s/CVE/tree/master/CVE-2020-7950
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.
3) Input validation error
EUVDB-ID: #VU24703
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 - Improper input validation
Exploit availability: Yes
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsDota 2: 7.00 - 7.23e
External linkshttp://github.com/bi7s/CVE/tree/master/CVE-2020-7949
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. However, proof of concept for this vulnerability is available.
