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CVE-2024-39547

Junos OS and Junos OS Evolved: cRPD: Receipt of crafted TCP traffic can trigger high CPU utilization

8.7 High

An Improper Handling of Exceptional Conditions vulnerability in the rpd-server of Juniper Networks Junos OS and Junos OS Evolved within cRPD allows an unauthenticated network-based attacker sending crafted TCP traffic to the routing engine (RE) to cause a CPU-based Denial of Service (DoS).

If specially crafted TCP traffic is received by the control plane, or a TCP session terminates unexpectedly, it will cause increased control plane CPU utilization by the rpd-server process.

While not explicitly required, the impact is more severe when RIB sharding is enabled.

Task accounting shows unexpected reads by the RPD Server jobs for shards:

user@junos> show task accounting detail ... read:RPD Server.0.0.0.0+780.192.168.0.78+48886 TOT:00000003.00379787 MAX:00000000.00080516 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+49144 TOT:00000004.00007565 MAX:00000000.00080360 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+49694 TOT:00000003.00600584 MAX:00000000.00080463 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+50246 TOT:00000004.00346998 MAX:00000000.00080338 RUNS: 233888\

This issue affects:

Junos OS with cRPD: 

  • All versions before 21.2R3-S8, 
  • 21.4 before 21.4R3-S7, 
  • 22.1 before 22.1R3-S6, 
  • 22.2 before 22.2R3-S4, 
  • 22.3 before 22.3R3-S3, 
  • 22.4 before 22.4R3-S2, 
  • 23.2 before 23.2R2-S2, 
  • 24.2 before 24.2R2; 

Junos OS Evolved with cRPD: 

  • All versions before 21.4R3-S7-EVO, 
  • 22.2 before 22.2R3-S4-EVO, 
  • 22.3 before 22.3R3-S3-EVO, 
  • 22.4 before 22.4R3-S2-EVO, 
  • 23.2 before 23.2R2-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

0.97%Up 0.9 points since Oct 12, 2024
90%50%10%1%

What each source reports

CVE List Score used 8.7

Junos OS and Junos OS Evolved: cRPD: Receipt of crafted TCP traffic can trigger high CPU utilization

An Improper Handling of Exceptional Conditions vulnerability in the rpd-server of Juniper Networks Junos OS and Junos OS Evolved within cRPD allows an unauthenticated network-based attacker sending crafted TCP traffic to the routing engine (RE) to cause a CPU-based Denial of Service (DoS).

If specially crafted TCP traffic is received by the control plane, or a TCP session terminates unexpectedly, it will cause increased control plane CPU utilization by the rpd-server process.

While not explicitly required, the impact is more severe when RIB sharding is enabled.

Task accounting shows unexpected reads by the RPD Server jobs for shards:

user@junos> show task accounting detail ... read:RPD Server.0.0.0.0+780.192.168.0.78+48886 TOT:00000003.00379787 MAX:00000000.00080516 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+49144 TOT:00000004.00007565 MAX:00000000.00080360 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+49694 TOT:00000003.00600584 MAX:00000000.00080463 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+50246 TOT:00000004.00346998 MAX:00000000.00080338 RUNS: 233888\

This issue affects:

Junos OS with cRPD: 

  • All versions before 21.2R3-S8, 
  • 21.4 before 21.4R3-S7, 
  • 22.1 before 22.1R3-S6, 
  • 22.2 before 22.2R3-S4, 
  • 22.3 before 22.3R3-S3, 
  • 22.4 before 22.4R3-S2, 
  • 23.2 before 23.2R2-S2, 
  • 24.2 before 24.2R2; 

Junos OS Evolved with cRPD: 

  • All versions before 21.4R3-S7-EVO, 
  • 22.2 before 22.2R3-S4-EVO, 
  • 22.3 before 22.3R3-S3-EVO, 
  • 22.4 before 22.4R3-S2-EVO, 
  • 23.2 before 23.2R2-EVO.
Record
CVE-2024-39547
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-755
Updated
2026-11-02
EUVDEUVD-2024-38073 8.7

An Improper Handling of Exceptional Conditions vulnerability in the rpd-server of Juniper Networks Junos OS and Junos OS Evolved within cRPD allows an unauthenticated network-based attacker sending crafted TCP traffic to the routing engine (RE) to cause a CPU-based Denial of Service (DoS).

If specially crafted TCP traffic is received by the control plane, or a TCP session terminates unexpectedly, it will cause increased control plane CPU utilization by the rpd-server process.

While not explicitly required, the impact is more severe when RIB sharding is enabled.

Task accounting shows unexpected reads by the RPD Server jobs for shards:

user@junos> show task accounting detail ... read:RPD Server.0.0.0.0+780.192.168.0.78+48886 TOT:00000003.00379787 MAX:00000000.00080516 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+49144 TOT:00000004.00007565 MAX:00000000.00080360 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+49694 TOT:00000003.00600584 MAX:00000000.00080463 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+50246 TOT:00000004.00346998 MAX:00000000.00080338 RUNS: 233888\

This issue affects:

Junos OS with cRPD: 

  • All versions before 21.2R3-S8, 
  • 21.4 before 21.4R3-S7, 
  • 22.1 before 22.1R3-S6, 
  • 22.2 before 22.2R3-S4, 
  • 22.3 before 22.3R3-S3, 
  • 22.4 before 22.4R3-S2, 
  • 23.2 before 23.2R2-S2, 
  • 24.2 before 24.2R2; 

Junos OS Evolved with cRPD: 

  • All versions before 21.4R3-S7-EVO, 
  • 22.2 before 22.2R3-S4-EVO, 
  • 22.3 before 22.3R3-S3-EVO, 
  • 22.4 before 22.4R3-S2-EVO, 
  • 23.2 before 23.2R2-EVO.
Record
EUVD-2024-38073
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/R:U
Updated
2026-11-03
GitHub AdvisoriesGHSA-37f4-v37x-33qj 8.7

An Improper Handling of Exceptional Conditions vulnerability in the rpd-server of Juniper...

An Improper Handling of Exceptional Conditions vulnerability in the rpd-server of Juniper Networks Junos OS and Junos OS Evolved within cRPD allows an unauthenticated network-based attacker sending crafted TCP traffic to the routing engine (RE) to cause a CPU-based Denial of Service (DoS).

If specially crafted TCP traffic is received by the control plane, or a TCP session terminates unexpectedly, it will cause increased control plane CPU utilization by the rpd-server process.

While not explicitly required, the impact is more severe when RIB sharding is enabled.

Task accounting shows unexpected reads by the RPD Server jobs for shards:

user@junos> show task accounting detail ... read:RPD Server.0.0.0.0+780.192.168.0.78+48886 TOT:00000003.00379787 MAX:00000000.00080516 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+49144 TOT:00000004.00007565 MAX:00000000.00080360 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+49694 TOT:00000003.00600584 MAX:00000000.00080463 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+50246 TOT:00000004.00346998 MAX:00000000.00080338 RUNS: 233888\

This issue affects:

Junos OS with cRPD: 

  • All versions before 21.2R3-S8, 
  • 21.4 before 21.4R3-S7, 
  • 22.1 before 22.1R3-S6, 
  • 22.2 before 22.2R3-S4, 
  • 22.3 before 22.3R3-S3, 
  • 22.4 before 22.4R3-S2, 
  • 23.2 before 23.2R2-S2, 
  • 24.2 before 24.2R2; 

Junos OS Evolved with cRPD: 

  • All versions before 21.4R3-S7-EVO, 
  • 22.2 before 22.2R3-S4-EVO, 
  • 22.3 before 22.3R3-S3-EVO, 
  • 22.4 before 22.4R3-S2-EVO, 
  • 23.2 before 23.2R2-EVO.
Record
GHSA-37f4-v37x-33qj
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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:Y/R:U/V:X/RE:X/U:X
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-755
Updated
2026-11-02
NVD 8.7

An Improper Handling of Exceptional Conditions vulnerability in the rpd-server of Juniper Networks Junos OS and Junos OS Evolved within cRPD allows an unauthenticated network-based attacker sending crafted TCP traffic to the routing engine (RE) to cause a CPU-based Denial of Service (DoS).

If specially crafted TCP traffic is received by the control plane, or a TCP session terminates unexpectedly, it will cause increased control plane CPU utilization by the rpd-server process.

While not explicitly required, the impact is more severe when RIB sharding is enabled.

Task accounting shows unexpected reads by the RPD Server jobs for shards:

user@junos> show task accounting detail ... read:RPD Server.0.0.0.0+780.192.168.0.78+48886 TOT:00000003.00379787 MAX:00000000.00080516 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+49144 TOT:00000004.00007565 MAX:00000000.00080360 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+49694 TOT:00000003.00600584 MAX:00000000.00080463 RUNS: 233888
read:RPD Server.0.0.0.0+780.192.168.0.78+50246 TOT:00000004.00346998 MAX:00000000.00080338 RUNS: 233888\

This issue affects:

Junos OS with cRPD: 

  • All versions before 21.2R3-S8, 
  • 21.4 before 21.4R3-S7, 
  • 22.1 before 22.1R3-S6, 
  • 22.2 before 22.2R3-S4, 
  • 22.3 before 22.3R3-S3, 
  • 22.4 before 22.4R3-S2, 
  • 23.2 before 23.2R2-S2, 
  • 24.2 before 24.2R2; 

Junos OS Evolved with cRPD: 

  • All versions before 21.4R3-S7-EVO, 
  • 22.2 before 22.2R3-S4-EVO, 
  • 22.3 before 22.3R3-S3-EVO, 
  • 22.4 before 22.4R3-S2-EVO, 
  • 23.2 before 23.2R2-EVO.
Record
CVE-2024-39547
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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:Y/R:U/V:X/RE:X/U:X
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-755
Updated
2026-11-02

Affected products

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-39547 is a high vulnerability (CVSS 8.7) in Juniper Junos, published October 11, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.97%, the 61st percentile. No source names a fixed version.

References

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