Remote code execution in Teeworlds

1) Improper input validation

EUVDB-ID: #VU6784

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-9400

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

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

External links

http://www.openwall.com/lists/oss-security/2016/11/16/8

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.