VMware NSX-V Edge up to 6.2.7/6.3.2 OSPF resource consumption

Summaryinfo

A vulnerability, which was classified as problematic, was found in VMware NSX-V Edge up to 6.2.7/6.3.2. Affected is an unknown function of the component OSPF Handler. Such manipulation leads to resource consumption. This vulnerability is uniquely identified as CVE-2017-4920. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in VMware NSX-V Edge up to 6.2.7/6.3.2. Affected by this issue is some unknown functionality of the component OSPF Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

The implementation of the OSPF protocol in VMware NSX-V Edge 6.2.x prior to 6.2.8 and NSX-V Edge 6.3.x prior to 6.3.3 doesn't correctly handle the link-state advertisement (LSA). A rogue LSA may exploit this issue resulting in continuous sending of LSAs between two routers eventually going in loop or loss of connectivity.

The weakness was disclosed 12/05/2017 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-2017-4920 since 12/26/2016. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 6.2.8 or 6.3.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 100277†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• VMware

Name

• NSX-V Edge

Version

• 6.2.0
• 6.2.1
• 6.2.2
• 6.2.3
• 6.2.4
• 6.2.5
• 6.2.6
• 6.2.7
• 6.3.0
• 6.3.1
• 6.3.2

License

• commercial

Website

• Vendor: https://www.vmware.com/

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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