Denial of service in OpenVPN



Published: 2018-04-24
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-9336
CWE-ID CWE-415
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		OpenVPN
Server applications / Remote access servers, VPN

Vendor openvpn.net

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Double free memory error

EUVDB-ID: #VU12129

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-9336

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to double-free memory error in Interactive Service. A remote attacker can trigger memory corruption and cause the service to crash.

Mitigation

Update to version 2.4.6.

Vulnerable software versions

OpenVPN: 2.4.0 - 2.4.5

External links

http://community.openvpn.net/openvpn/wiki/ChangesInOpenvpn24


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 send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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