CVE-2024-21602: Junos OS Evolved: ACX7024, ACX7100-32C and ACX7100-48L: Traffic stops when a specific IPv4 UDP packet is received by the RE
First published: Fri Jan 12 2024(Updated: )
A NULL Pointer Dereference vulnerability in Juniper Networks Junos OS Evolved on ACX7024, ACX7100-32C and ACX7100-48L allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). If a specific IPv4 UDP packet is received and sent to the Routing Engine (RE) packetio crashes and restarts which causes a momentary traffic interruption. Continued receipt of such packets will lead to a sustained DoS. This issue does not happen with IPv6 packets. This issue affects Juniper Networks Junos OS Evolved on ACX7024, ACX7100-32C and ACX7100-48L: * 21.4-EVO versions earlier than 21.4R3-S6-EVO; * 22.1-EVO versions earlier than 22.1R3-S5-EVO; * 22.2-EVO versions earlier than 22.2R2-S1-EVO, 22.2R3-EVO; * 22.3-EVO versions earlier than 22.3R2-EVO. This issue does not affect Juniper Networks Junos OS Evolved versions earlier than 21.4R1-EVO.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Junos OS Evolved | =21.4 | |
| Junos OS Evolved | =21.4-r1 | |
| Junos OS Evolved | =21.4-r1-s1 | |
| Junos OS Evolved | =21.4-r1-s2 | |
| Junos OS Evolved | =21.4-r2 | |
| Junos OS Evolved | =21.4-r2-s1 | |
| Junos OS Evolved | =21.4-r2-s2 | |
| Junos OS Evolved | =21.4-r3 | |
| Junos OS Evolved | =21.4-r3-s1 | |
| Junos OS Evolved | =21.4-r3-s2 | |
| Junos OS Evolved | =21.4-r3-s3 | |
| Junos OS Evolved | =21.4-r3-s4 | |
| Junos OS Evolved | =21.4-r3-s5 | |
| Junos OS Evolved | =22.1 | |
| Junos OS Evolved | =22.1-r1 | |
| Junos OS Evolved | =22.1-r1-s1 | |
| Junos OS Evolved | =22.1-r1-s2 | |
| Junos OS Evolved | =22.1-r2 | |
| Junos OS Evolved | =22.1-r2-s1 | |
| Junos OS Evolved | =22.1-r3 | |
| Junos OS Evolved | =22.1-r3-s1 | |
| Junos OS Evolved | =22.1-r3-s2 | |
| Junos OS Evolved | =22.1-r3-s3 | |
| Junos OS Evolved | =22.1-r3-s4 | |
| Junos OS Evolved | =22.2 | |
| Junos OS Evolved | =22.2-r1 | |
| Junos OS Evolved | =22.2-r1-s1 | |
| Junos OS Evolved | =22.2-r2 | |
| Junos OS Evolved | =22.3 | |
| Junos OS Evolved | =22.3-r1 | |
| Junos OS Evolved | =22.3-r1-s1 | |
| Junos OS Evolved | =22.3-r1-s2 |
Remedy
The following software releases have been updated to resolve this specific issue: 21.4R3-S6-EVO, 22.1R3-S5-EVO, 22.2R2-S1-EVO, 22.2R3-EVO, 22.3R2-EVO, 22.4R1-EVO, and all subsequent releases.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-21602?
CVE-2024-21602 has a high severity rating due to its potential to cause a Denial of Service (DoS).
How do I fix CVE-2024-21602?
To mitigate CVE-2024-21602, it's recommended to upgrade to a patched version of Junos OS Evolved that addresses the vulnerability.
What devices are affected by CVE-2024-21602?
CVE-2024-21602 affects Juniper Networks Junos OS Evolved on the ACX7024, ACX7100-32C, and ACX7100-48L platforms.
What type of attack does CVE-2024-21602 facilitate?
CVE-2024-21602 allows an unauthenticated, network-based attacker to exploit a NULL Pointer Dereference vulnerability, resulting in a Denial of Service.
Is CVE-2024-21602 exploitable remotely?
Yes, CVE-2024-21602 is vulnerable to remote exploitation as it can be triggered by specific IPv4 UDP packets sent to the Routing Engine.
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