#VU6784 Improper input validation in Teeworlds - CVE-2016-9400

Vulnerability identifier: #VU6784

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-9400

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Teeworlds
Client/Desktop applications / Games

Vendor: Teeworlds

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

The weakness exists due to flaw in the CClient::ProcessServerPacket method in engine/client/client.cpp. A remote attacker can use specially crafted vectors involving snap handling to write to arbitrary physical memory locations and possibly execute arbitrary code.

Successful exploitation of the vulnerability may result in full access to the affected system.

Mitigation
Update to version 0.6.4.

Vulnerable software versions

Teeworlds: 0.6.2 - 0.6.3

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External links
https://www.openwall.com/lists/oss-security/2016/11/16/8

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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.