CVE-2024-21590
Junos OS Evolved: Packets which are not destined to the device can reach the RE
An Improper Input Validation vulnerability in Juniper Tunnel Driver (jtd) and ICMP module of Juniper Networks Junos OS Evolved allows an unauthenticated attacker within the MPLS administrative domain to send specifically crafted packets to the Routing Engine (RE) to cause a Denial of Service (DoS).
When specifically crafted transit MPLS IPv4 packets are received by the Packet Forwarding Engine (PFE), these packets are internally forwarded to the RE. Continued receipt of these packets may create a sustained Denial of Service (DoS) condition.
This issue affects Juniper Networks Junos OS:
- All versions before 21.2R3-S8-EVO;
- from 21.4-EVO before 21.4R3-S6-EVO;
- from 22.2-EVO before 22.2R3-S4-EVO;
- from 22.3-EVO before 22.3R3-S3-EVO;
- from 22.4-EVO before 22.4R3-EVO;
- from 23.2-EVO before 23.2R2-EVO.
- from 23.4-EVO before 23.4R1-S1-EVO.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Junos OS Evolved: Packets which are not destined to the device can reach the RE
An Improper Input Validation vulnerability in Juniper Tunnel Driver (jtd) and ICMP module of Juniper Networks Junos OS Evolved allows an unauthenticated attacker within the MPLS administrative domain to send specifically crafted packets to the Routing Engine (RE) to cause a Denial of Service (DoS).
When specifically crafted transit MPLS IPv4 packets are received by the Packet Forwarding Engine (PFE), these packets are internally forwarded to the RE. Continued receipt of these packets may create a sustained Denial of Service (DoS) condition.
This issue affects Juniper Networks Junos OS:
- All versions before 21.2R3-S8-EVO;
- from 21.4-EVO before 21.4R3-S6-EVO;
- from 22.2-EVO before 22.2R3-S4-EVO;
- from 22.3-EVO before 22.3R3-S3-EVO;
- from 22.4-EVO before 22.4R3-EVO;
- from 23.2-EVO before 23.2R2-EVO.
- from 23.4-EVO before 23.4R1-S1-EVO.
- Record
CVE-2024-21590- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2024-19238
An Improper Input Validation vulnerability in Juniper Tunnel Driver (jtd) and ICMP module of Juniper Networks Junos OS Evolved allows an unauthenticated attacker within the MPLS administrative domain to send specifically crafted packets to the Routing Engine (RE) to cause a Denial of Service (DoS).
When specifically crafted transit MPLS IPv4 packets are received by the Packet Forwarding Engine (PFE), these packets are internally forwarded to the RE. Continued receipt of these packets may create a sustained Denial of Service (DoS) condition.
This issue affects Juniper Networks Junos OS:
- All versions before 21.2R3-S8-EVO;
- from 21.4-EVO before 21.4R3-S6-EVO;
- from 22.2-EVO before 22.2R3-S4-EVO;
- from 22.3-EVO before 22.3R3-S3-EVO;
- from 22.4-EVO before 22.4R3-EVO;
- from 23.2-EVO before 23.2R2-EVO.
- from 23.4-EVO before 23.4R1-S1-EVO.
- Record
EUVD-2024-19238- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-53r8-h9fr-mwc7
An Improper Input Validation vulnerability in Juniper Tunnel Driver (jtd) and ICMP module of...
An Improper Input Validation vulnerability in Juniper Tunnel Driver (jtd) and ICMP module of Juniper Networks Junos OS Evolved allows an unauthenticated attacker within the MPLS administrative domain to send specifically crafted packets to the Routing Engine (RE) to cause a Denial of Service (DoS).
When specifically crafted transit MPLS IPv4 packets are received by the Packet Forwarding Engine (PFE), these packets are internally forwarded to the RE. Continued receipt of these packets may create a sustained Denial of Service (DoS) condition.
This issue affects Juniper Networks Junos OS:
- All versions before 21.2R3-S8-EVO;
- from 21.4-EVO before 21.4R3-S6-EVO;
- from 22.2-EVO before 22.2R3-S4-EVO;
- from 22.3-EVO before 22.3R3-S3-EVO;
- from 22.4-EVO before 22.4R3-EVO;
- from 23.2-EVO before 23.2R2-EVO.
- from 23.4-EVO before 23.4R1-S1-EVO.
- Record
GHSA-53r8-h9fr-mwc7- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
An Improper Input Validation vulnerability in Juniper Tunnel Driver (jtd) and ICMP module of Juniper Networks Junos OS Evolved allows an unauthenticated attacker within the MPLS administrative domain to send specifically crafted packets to the Routing Engine (RE) to cause a Denial of Service (DoS).
When specifically crafted transit MPLS IPv4 packets are received by the Packet Forwarding Engine (PFE), these packets are internally forwarded to the RE. Continued receipt of these packets may create a sustained Denial of Service (DoS) condition.
This issue affects Juniper Networks Junos OS:
- All versions before 21.2R3-S8-EVO;
- from 21.4-EVO before 21.4R3-S6-EVO;
- from 22.2-EVO before 22.2R3-S4-EVO;
- from 22.3-EVO before 22.3R3-S3-EVO;
- from 22.4-EVO before 22.4R3-EVO;
- from 23.2-EVO before 23.2R2-EVO.
- from 23.4-EVO before 23.4R1-S1-EVO.
- Record
CVE-2024-21590- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-21590 is a high vulnerability (CVSS 7.1) in Juniper Junos Os Evolved, published April 12, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 30th percentile. No source names a fixed version.