Overview
The vulnerability CVE-2024-21604, identified in the kernel of Juniper Networks Junos OS Evolved, poses a significant threat to system security. It allows network-based attackers to create a Denial of Service (DoS), which could lead to system compromise or data leakage. This vulnerability is particularly concerning due to its broad reach, affecting a wide range of Juniper Networks Junos OS Evolved versions.
Vulnerability Summary
CVE ID: CVE-2024-21604
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
A new way to communicate
Ameeba Chat is built on encrypted identity, not personal profiles.
Message, call, share files, and coordinate with identities kept separate.
- • Encrypted identity
- • Ameeba Chat authenticates access
- • Aliases and categories
- • End-to-end encrypted chat, calls, and files
- • Secure notes for sensitive information
Private communication, rethought.
Product | Affected Versions
Juniper Networks Junos OS Evolved | All versions earlier than 20.4R3-S7-EVO
Juniper Networks Junos OS Evolved | 21.2R1-EVO and later
Juniper Networks Junos OS Evolved | 21.4-EVO versions earlier than 21.4R3-S5-EVO
Juniper Networks Junos OS Evolved | 22.1-EVO versions earlier than 22.1R3-S2-EVO
Juniper Networks Junos OS Evolved | 22.2-EVO versions earlier than 22.2R3-EVO
Juniper Networks Junos OS Evolved | 22.3-EVO versions earlier than 22.3R2-EVO
Juniper Networks Junos OS Evolved | 22.4-EVO versions earlier than 22.4R2-EVO
How the Exploit Works
The exploit takes advantage of a vulnerability in the kernel of Juniper Networks Junos OS Evolved, which fails to allocate resources without limits or throttling. An attacker can exploit this vulnerability by sending a high rate of specific valid packets to be processed by the routing engine. This overload of packets leads to a loss of connectivity of the routing engine with other system components, causing a complete and persistent system outage.
Conceptual Example Code
While the exact method to exploit this vulnerability may vary, a conceptual example might involve an attacker flooding the network with packets in a targeted attack. This could be done using a tool like hping3:
hping3 -i u1 -S -p 80 target_IPIn this example, `-i u1` sends one packet every microsecond, `-S` sets the SYN flag, `-p 80` targets port 80, and `target_IP` is the IP address of the targeted system. This is a simplified example and the actual exploit may involve more complex techniques or specific types of packets.