Juniper Junos Ethernet OAM Packet improper check or handling of exceptional conditions

Summaryinfo

A vulnerability classified as problematic has been found in Juniper Junos. Affected by this vulnerability is an unknown functionality of the component Ethernet OAM. This manipulation as part of Packet causes improper check or handling of exceptional conditions. This vulnerability is tracked as CVE-2020-1639. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Juniper Junos (Router Operating System) (version now known) and classified as problematic. Affected by this vulnerability is some unknown processing of the component Ethernet OAM. The manipulation as part of a Packet leads to a improper check or handling of exceptional conditions vulnerability. The CWE definition for the vulnerability is CWE-703. The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product. As an impact it is known to affect availability. The summary by CVE is:

When an attacker sends a specific crafted Ethernet Operation, Administration, and Maintenance (Ethernet OAM) packet to a target device, it may improperly handle the incoming malformed data and fail to sanitize this incoming data resulting in an overflow condition. This overflow condition in Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) condition by coring the CFM daemon. Continued receipt of these packets may cause an extended Denial of Service condition. This issue affects: Juniper Networks Junos OS 12.3 versions prior to 12.3R12-S15; 12.3X48 versions prior to 12.3X48-D95 on SRX Series; 14.1X50 versions prior to 14.1X50-D145; 14.1X53 versions prior to 14.1X53-D47; 15.1 versions prior to 15.1R2; 15.1X49 versions prior to 15.1X49-D170 on SRX Series; 15.1X53 versions prior to 15.1X53-D67.

The weakness was disclosed 04/08/2020. This vulnerability is known as CVE-2020-1639 since 11/04/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

Upgrading eliminates this vulnerability.

The entries VDB-152976, VDB-152975, VDB-152974 and VDB-152973 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos

License

• commercial

Website

• Vendor: https://www.juniper.net/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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