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CVE-2024-39547
CVE ID
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CVE-2024-39547
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
Description
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.
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General Information
Vendors
- Juniper Networks
Products
- Junos OS,
- Junos OS Evolved
References
Miscellaneous
Additional Info
Technical Analysis
Report as Emergent Threat Response
Report as Exploited in the Wild
CVE ID
AttackerKB requires a CVE ID in order to pull vulnerability data and references from the CVE list and the National Vulnerability Database. If available, please supply below:
