Juniper Junos rpd Daemon BGP UPDATE invalid special elements

Summaryinfo

A vulnerability was found in Juniper Junos. It has been declared as problematic. The affected element is an unknown function of the component rpd Daemon. Such manipulation as part of BGP UPDATE leads to improper handling of invalid use of special elements. This vulnerability is referenced as CVE-2020-1646. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Juniper Junos (Router Operating System) (version now known). Affected by this issue is some unknown processing of the component rpd Daemon. The manipulation as part of a BGP UPDATE leads to a improper handling of invalid use of special elements vulnerability. Using CWE to declare the problem leads to CWE-159. The product does not properly filter, remove, quote, or otherwise manage the invalid use of special elements in user-controlled input, which could cause adverse effect on its behavior and integrity. Impacted is availability. CVE summarizes:

On Juniper Networks Junos OS and Junos OS Evolved devices, processing a specific UPDATE for an EBGP peer can lead to a routing process daemon (RPD) crash and restart. This issue occurs only when the device is receiving and processing the BGP UPDATE for an EBGP peer. This issue does not occur when the device is receiving and processing the BGP UPDATE for an IBGP peer. However, the offending BGP UPDATE can originally come from an EBGP peer, propagates through the network via IBGP peers without causing crash, then it causes RPD crash when it is processed for a BGP UPDATE towards an EBGP peer. Repeated receipt and processing of the same specific BGP UPDATE can result in an extended Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 17.3R3-S6, 17.4R2-S7, and 18.1R3-S7. Juniper Networks Junos OS Evolved 19.2R2-EVO and later versions, prior to 19.3R1-EVO. Other Junos OS releases are not affected.

The weakness was published 07/17/2020 (Website). The advisory is shared for download at kb.juniper.net. This vulnerability is handled as CVE-2020-1646 since 11/04/2019. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability.

Similar entries are available at VDB-158783, VDB-158782, VDB-158779 and VDB-158778. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos

License

• commercial

Website

• Vendor: https://www.juniper.net/

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Once again VulDB remains the best source for vulnerability data.

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