Juniper Junos OS jsf inconsistent special elements

Summaryinfo

A vulnerability, which was classified as critical, was found in Juniper Junos OS. The impacted element is an unknown function of the component jsf. Executing a manipulation can lead to improper handling of inconsistent special elements. This vulnerability is tracked as CVE-2023-36843. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Juniper Junos OS (Router Operating System) (affected version not known). It has been declared as critical. This vulnerability affects some unknown functionality of the component jsf. The manipulation with an unknown input leads to a improper handling of inconsistent special elements vulnerability. The CWE definition for the vulnerability is CWE-168. The product does not properly handle input in which an inconsistency exists between two or more special characters or reserved words. As an impact it is known to affect availability. CVE summarizes:

An Improper Handling of Inconsistent Special Elements vulnerability in the Junos Services Framework (jsf) module of Juniper Networks Junos OS allows an unauthenticated network based attacker to cause a crash in the Packet Forwarding Engine (pfe) and thereby resulting in a Denial of Service (DoS). Upon receiving malformed SSL traffic, the PFE crashes. A manual restart will be needed to recover the device. This issue only affects devices with Juniper Networks Advanced Threat Prevention (ATP) Cloud enabled with Encrypted Traffic Insights (configured via ‘security-metadata-streaming policy’). This issue affects Juniper Networks Junos OS: * All versions prior to 20.4R3-S8, 20.4R3-S9; * 21.1 version 21.1R1 and later versions; * 21.2 versions prior to 21.2R3-S6; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S4; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R2-S2, 22.3R3; * 22.4 versions prior to 22.4R2-S1, 22.4R3;

The weakness was disclosed 10/13/2023 as JSA73174. The advisory is available at supportportal.juniper.net. This vulnerability was named CVE-2023-36843 since 06/27/2023. The technical details are unknown and an exploit is not available.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos OS

License

• commercial

Website

• Vendor: https://www.juniper.net/

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