Juniper Networks Junos OS up to 23.2R1 802.1X Authentication Daemon denial of service

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Juniper Networks Junos OS up to 23.2R1. This affects an unknown function of the component 802.1X Authentication Daemon. Performing a manipulation results in denial of service. This vulnerability is known as CVE-2024-39511. Attacking locally is a requirement. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Juniper Networks Junos OS up to 23.2R1. This affects an unknown functionality of the component 802.1X Authentication Daemon. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

An Improper Input Validation vulnerability in the 802.1X Authentication (dot1x) Daemon of Juniper Networks Junos OS allows a local, low-privileged attacker with access to the CLI to cause a Denial of Service (DoS). On running a specific operational dot1x command, the dot1x daemon crashes. An attacker can cause a sustained DoS condition by running this command repeatedly. When the crash occurs, the authentication status of any 802.1x clients is cleared, and any authorized dot1x port becomes unauthorized. The client cannot re-authenticate until the dot1x daemon restarts. This issue affects Junos OS: * All versions before 20.4R3-S10; * 21.2 versions before 21.2R3-S7; * 21.4 versions before 21.4R3-S6; * 22.1 versions before 22.1R3-S5; * 22.2 versions before 22.2R3-S3; * 22.3 versions before 22.3R3-S2; * 22.4 versions before 22.4R3-S1; * 23.2 versions before 23.2R2.

The advisory is shared at supportportal.juniper.net. This vulnerability is uniquely identified as CVE-2024-39511 since 06/25/2024. The exploitability is told to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available.

Upgrading to version 20.4R3-S10, 21.2R3-S7, 21.4R3-S6, 22.1R3-S5, 22.2R3-S3, 22.3R3-S2, 22.4R3-S1 or 23.2R2 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper Networks

Name

• Junos OS

Version

• 20.4R3-S10
• 21.2R3-S6
• 21.4R3-S5
• 22.1R3-S4
• 22.2R3-S2
• 22.3R3-S1
• 22.4R3-S0
• 23.2R1

License

• commercial

CPE 2.3info

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CPE 2.2info

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