Juniper Networks Junos OS up to 23.2R1 on SRX Packet Forwarding Engine format string

Summaryinfo

A vulnerability was found in Juniper Networks Junos OS up to 21.4R3-S5/22.2R3-S2/22.3R3-S2/22.4R2/23.2R1 on SRX and classified as critical. Affected by this issue is some unknown functionality of the component Packet Forwarding Engine. Such manipulation leads to format string. This vulnerability is traded as CVE-2024-39529. The attack may be launched remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Juniper Networks Junos OS up to 21.4R3-S5/22.2R3-S2/22.3R3-S2/22.4R2/23.2R1 on SRX and classified as critical. Affected by this issue is an unknown code of the component Packet Forwarding Engine. The manipulation with an unknown input leads to a format string vulnerability. Using CWE to declare the problem leads to CWE-134. The product uses a function that accepts a format string as an argument, but the format string originates from an external source. Impacted is availability. CVE summarizes:

A Use of Externally-Controlled Format String vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS). If DNS Domain Generation Algorithm (DGA) detection or tunnel detection, and DNS-filtering traceoptions are configured, and specific valid transit DNS traffic is received this causes a PFE crash and restart, leading to a Denial of Service. This issue affects Junos OS: * All versions before 21.4R3-S6, * 22.2 versions before 22.2R3-S3, * 22.3 versions before 22.3R3-S3, * 22.4 versions before 22.4R3, * 23.2 versions before 23.2R2.

The advisory is shared for download at supportportal.juniper.net. This vulnerability is handled as CVE-2024-39529 since 06/25/2024. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/23/2024).

Upgrading to version 21.4R3-S6, 22.2R3-S3, 22.3R3-S3, 22.4R3 or 23.2R2 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper Networks

Name

• Junos OS

Version

• 21.4R3-S5
• 22.2R3-S2
• 22.3R3-S2
• 22.4R2
• 23.2R1

License

• commercial

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CPE 2.2info

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