Juniper Junos OS up to 22.4R2-S1 flowd stack-based overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in Juniper Junos OS up to 22.4R2-S1. The affected element is an unknown function of the component flowd. Performing a manipulation results in stack-based overflow. This vulnerability is identified as CVE-2024-30392. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Juniper Junos OS up to 22.4R2-S1. This affects an unknown functionality of the component flowd. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on availability. The summary by CVE is:

A Stack-based Buffer Overflow vulnerability in Flow Processing Daemon (flowd) of Juniper Networks Junos OS allows an unauthenticated, network-based attacker to cause Denial of Service (DoS). On all Junos OS MX Series platforms with SPC3 and MS-MPC/-MIC, when URL filtering is enabled and a specific URL request is received and processed, flowd will crash and restart. Continuous reception of the specific URL request will lead to a sustained Denial of Service (DoS) condition. This issue affects: Junos OS: * all versions before 21.2R3-S6, * from 21.3 before 21.3R3-S5, * from 21.4 before 21.4R3-S5, * from 22.1 before 22.1R3-S3, * from 22.2 before 22.2R3-S1, * from 22.3 before 22.3R2-S2, 22.3R3, * from 22.4 before 22.4R2-S1, 22.4R3.

The advisory is shared at supportportal.juniper.net. This vulnerability is uniquely identified as CVE-2024-30392 since 03/26/2024. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/23/2026).

Upgrading to version 21.2R3-S6, 21.3R3-S5, 21.4R3-S5, 22.1R3-S3, 22.2R3-S1, 22.3R2-S2, 22.3R3, 22.4R2-S1 or 22.4R3 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos OS

Version

• 21.2R3-S5
• 21.3R3-S4
• 21.4R3-S4
• 22.1R3-S2
• 22.2R3-S0
• 22.3R2
• 22.3R2-S2
• 22.4R2
• 22.4R2-S1

License

• commercial

Website

• Vendor: https://www.juniper.net/

CPE 2.3info

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