Denial of service in VMware NSX-V Edge

1) Denial of service

EUVDB-ID: #VU7876

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-4920

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The weakness exists due to improper handling of the link-state advertisement (LSA) by implementation of the OSPF protocol. A local attacker can send a malicious LSA continuously between two routers and cause the system to stop functioning properly.

Successful exploitation of the vulnerability results in denial of service.

Mitigation

Update to version 6.2.8 or 6.3.3.

Vulnerable software versions

VMware NSX-V Edge: 6.2.0 - 6.3.0

CPE2.3

• cpe:2.3:a:vmware:vmware_nsx-v_edge:6.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:vmware:vmware_nsx-v_edge:6.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:vmware:vmware_nsx-v_edge:6.2.2:*:*:*:*:*:*:*

External links

https://www.vmware.com/us/security/advisories/VMSA-2017-0014.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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