CVE-2024-21612
Junos OS Evolved: Specific TCP traffic causes OFP core and restart of RE
An Improper Handling of Syntactically Invalid Structure vulnerability in Object Flooding Protocol (OFP) service of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).
On all Junos OS Evolved platforms, when specific TCP packets are received on an open OFP port, the OFP crashes leading to a restart of Routine Engine (RE). Continuous receipt of these specific TCP packets will lead to a sustained Denial of Service (DoS) condition.
This issue affects:
Juniper Networks Junos OS Evolved
- All versions earlier than 21.2R3-S7-EVO;
- 21.3 versions earlier than 21.3R3-S5-EVO ;
- 21.4 versions earlier than 21.4R3-S5-EVO;
- 22.1 versions earlier than 22.1R3-S4-EVO;
- 22.2 versions earlier than 22.2R3-S3-EVO ;
- 22.3 versions earlier than 22.3R3-EVO;
- 22.4 versions earlier than 22.4R2-EVO, 22.4R3-EVO.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Junos OS Evolved: Specific TCP traffic causes OFP core and restart of RE
An Improper Handling of Syntactically Invalid Structure vulnerability in Object Flooding Protocol (OFP) service of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).
On all Junos OS Evolved platforms, when specific TCP packets are received on an open OFP port, the OFP crashes leading to a restart of Routine Engine (RE). Continuous receipt of these specific TCP packets will lead to a sustained Denial of Service (DoS) condition.
This issue affects:
Juniper Networks Junos OS Evolved
- All versions earlier than 21.2R3-S7-EVO;
- 21.3 versions earlier than 21.3R3-S5-EVO ;
- 21.4 versions earlier than 21.4R3-S5-EVO;
- 22.1 versions earlier than 22.1R3-S4-EVO;
- 22.2 versions earlier than 22.2R3-S3-EVO ;
- 22.3 versions earlier than 22.3R3-EVO;
- 22.4 versions earlier than 22.4R2-EVO, 22.4R3-EVO.
- Record
CVE-2024-21612- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-228
- Updated
- 2026-11-02
EUVDEUVD-2024-19260
An Improper Handling of Syntactically Invalid Structure vulnerability in Object Flooding Protocol (OFP) service of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).
On all Junos OS Evolved platforms, when specific TCP packets are received on an open OFP port, the OFP crashes leading to a restart of Routine Engine (RE). Continuous receipt of these specific TCP packets will lead to a sustained Denial of Service (DoS) condition.
This issue affects:
Juniper Networks Junos OS Evolved
- All versions earlier than 21.2R3-S7-EVO;
- 21.3 versions earlier than 21.3R3-S5-EVO ;
- 21.4 versions earlier than 21.4R3-S5-EVO;
- 22.1 versions earlier than 22.1R3-S4-EVO;
- 22.2 versions earlier than 22.2R3-S3-EVO ;
- 22.3 versions earlier than 22.3R3-EVO;
- 22.4 versions earlier than 22.4R2-EVO, 22.4R3-EVO.
- Record
EUVD-2024-19260- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-rj85-c5h6-pfrr
An Improper Handling of Syntactically Invalid Structure vulnerability in Object Flooding...
An Improper Handling of Syntactically Invalid Structure vulnerability in Object Flooding Protocol (OFP) service of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).
On all Junos OS Evolved platforms, when specific TCP packets are received on an open OFP port, the OFP crashes leading to a restart of Routine Engine (RE). Continuous receipt of these specific TCP packets will lead to a sustained Denial of Service (DoS) condition.
This issue affects:
Juniper Networks Junos OS Evolved
- All versions earlier than 21.2R3-S7-EVO;
- 21.3 versions earlier than 21.3R3-S5-EVO ;
- 21.4 versions earlier than 21.4R3-S5-EVO;
- 22.1 versions earlier than 22.1R3-S4-EVO;
- 22.2 versions earlier than 22.2R3-S3-EVO ;
- 22.3 versions earlier than 22.3R3-EVO;
- 22.4 versions earlier than 22.4R2-EVO, 22.4R3-EVO.
- Record
GHSA-rj85-c5h6-pfrr- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-228
- Updated
- 2026-11-02
NVD
An Improper Handling of Syntactically Invalid Structure vulnerability in Object Flooding Protocol (OFP) service of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).
On all Junos OS Evolved platforms, when specific TCP packets are received on an open OFP port, the OFP crashes leading to a restart of Routine Engine (RE). Continuous receipt of these specific TCP packets will lead to a sustained Denial of Service (DoS) condition.
This issue affects:
Juniper Networks Junos OS Evolved
- All versions earlier than 21.2R3-S7-EVO;
- 21.3 versions earlier than 21.3R3-S5-EVO ;
- 21.4 versions earlier than 21.4R3-S5-EVO;
- 22.1 versions earlier than 22.1R3-S4-EVO;
- 22.2 versions earlier than 22.2R3-S3-EVO ;
- 22.3 versions earlier than 22.3R3-EVO;
- 22.4 versions earlier than 22.4R2-EVO, 22.4R3-EVO.
- Record
CVE-2024-21612- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-228
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-21612 is a high vulnerability (CVSS 7.5) in Juniper Junos Os Evolved, published January 12, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 45th percentile. No source names a fixed version.