An Expired Pointer Dereference vulnerability in Routing Protocol Daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause Denial of Service (DoS).On all Junos OS and Junos OS Evolved platforms, when an MPLS Label-Switched Path (LSP) is configured with node-link-protection and transport-class, and an LSP flaps, rpd crashes and restarts. Continuous flapping of LSP can cause a sustained Denial of Service (DoS) condition.
This issue affects:
Junos OS:
* All versions before 22.2R3-S4,
* 22.4 versions before 22.4R3-S2,
* 23.2 versions before 23.2R2,
* 23.4 versions before 23.4R2.
Junos OS Evolved:
* All versions before 22.2R3-S4-EVO,
* 22.4-EVO versions before 22.4R3-S2-EVO,
* 23.2-EVO versions before 23.2R2-EVO,
* 23.4-EVO versions before 23.4R2-EVO.
CVSS Score
6.0
EPSS Score
0.002
Published
2025-04-09
An Improper Input Validation vulnerability in the syslog stream TCP transport of Juniper Networks Junos OS on MX240, MX480 and MX960 devices with MX-SPC3 Security Services Card allows an unauthenticated, network-based attacker, to send specific spoofed packets to cause a CPU Denial of Service (DoS) to the MX-SPC3 SPUs.
Continued receipt and processing of these specific packets will sustain the DoS condition.
This issue affects Junos OS: * All versions before 22.2R3-S6,
* from 22.4 before 22.4R3-S4,
* from 23.2 before 23.2R2-S3,
* from 23.4 before 23.4R2-S4,
* from 24.2 before 24.2R1-S2, 24.2R2
An indicator of compromise will indicate the SPC3 SPUs utilization has spiked.
For example:
user@device> show services service-sets summary
Service sets CPU
Interface configured Bytes used Session bytes used Policy bytes used utilization
"interface" 1 "bytes" (percent%) "sessions" ("percent"%) "bytes" ("percent"%) 99.97 % OVLD <<<<<< look for high CPU usage
CVSS Score
8.7
EPSS Score
0.004
Published
2025-04-09
An Improper Check for Unusual or Exceptional Conditions vulnerability in routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, logically adjacent BGP peer to cause Denial of Service (DoS).
On all Junos OS and Junos OS Evolved platforms, when BGP rib-sharding and update-threading are configured, and a BGP peer flap is done with specific timing, rpd crashes and restarts. Continuous peer flapping at specific time intervals will result in a sustained Denial of Service (DoS) condition.
This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations. This issue requires a remote attacker to have at least one established BGP session. The issue can occur with or without logical-systems enabled.
This issue affects:
Junos OS:
* All versions before 20.4R3-S8,
* 21.2 versions before 21.2R3-S6,
* 21.3 versions before 21.3R3-S5,
* 21.4 versions before 21.4R3-S4,
* 22.1 versions before 22.1R3-S3,
* 22.2 versions before 22.2R3-S1,
* 22.3 versions before 22.3R3,
* 22.4 versions before 22.4R3.
Junos OS Evolved:
* All versions before 21.2R3-S6-EVO,
* 21.3-EVO versions before 21.3R3-S5-EVO,
* 21.4-EVO versions before 21.4R3-S4-EVO,
* 22.1-EVO versions before 22.1R3-S3-EVO,
* 22.2-EVO versions before :22.2R3-S1-EVO,
* 22.3-EVO versions before 22.3R3-EVO,
* 22.4-EVO versions before 22.4R3-EVO.
CVSS Score
6.0
EPSS Score
0.002
Published
2025-04-09
An Improper Check for Unusual or Exceptional Conditions vulnerability in the pfe (packet forwarding engine) of Juniper Networks Junos OS on MX Series causes a port within a pool to be blocked leading to Denial of Service (DoS).
In a DS-Lite (Dual-Stack Lite) and NAT (Network Address Translation) scenario, when crafted IPv6 traffic is received and prefix-length is set to 56, the ports assigned to the user will not be freed. Eventually, users cannot establish new connections. Affected FPC/PIC need to be manually restarted to recover.
Following is the command to identify the issue:
user@host> show services nat source port-block
Host_IP External_IP Port_Block Ports_Used/ Block_State/
Range Ports_Total Left_Time(s)
2001:: x.x.x.x 58880-59391 256/256*1 Active/- >>>>>>>>port still usedThis issue affects Junos OS on MX Series:
* from 21.2 before 21.2R3-S8,
* from 21.4 before 21.4R3-S7,
* from 22.1 before 22.1R3-S6,
* from 22.2 before 22.2R3-S4,
* from 22.3 before 22.3R3-S3,
* from 22.4 before 22.4R3-S2,
* from 23.2 before 23.2R2-S1,
* from 23.4 before 23.4R1-S2, 23.4R2.
This issue does not affect versions before 20.2R1.
CVSS Score
8.7
EPSS Score
0.004
Published
2025-04-09
A Deadlock vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS).
When a large amount of traffic is processed by ATP Cloud inspection, a deadlock can occur which will result in a PFE crash and restart. Whether the crash occurs, depends on system internal timing that is outside the attackers control.
This issue affects Junos OS on SRX Series:
* All versions before 21.3R3-S1,
* 21.4 versions before 21.4R3,
* 22.1 versions before 22.1R2,
* 22.2 versions before 22.2R1-S2, 22.2R2.
CVSS Score
8.2
EPSS Score
0.003
Published
2024-10-11
An Improper Validation of Specified Type of Input vulnerability in the packet forwarding engine (pfe) Juniper Networks Junos OS on SRX5000 Series allows an unauthenticated, network based attacker to cause a Denial of Service (Dos).
When a non-clustered SRX5000 device receives a specifically malformed packet this will cause a flowd crash and restart.
This issue affects Junos OS:
* 22.1 releases 22.1R1 and later before 22.2R3-S5,
* 22.3 releases before 22.3R3-S4,
* 22.4 releases before 22.4R3-S4,
* 23.2 releases before 23.2R2-S2,
* 23.4 releases before 23.4R2-S1,
* 24.2 releases before 24.2R1-S1, 24.2R2.
Please note that the PR does indicate that earlier versions have been fixed as well, but these won't be adversely impacted by this.
CVSS Score
8.7
EPSS Score
0.006
Published
2024-10-11
A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of the Juniper Networks Junos OS on the MX Series platforms with Trio-based FPCs allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).
In case of channelized Modular Interface Cards (MICs), every physical interface flap operation will leak heap memory. Over a period of time, continuous physical interface flap operations causes local FPC to eventually run out of memory and crash.
Below CLI command can be used to check the memory usage over a period of time:
user@host> show chassis fpc
Temp CPU Utilization (%) CPU Utilization (%) Memory
Utilization (%)
Slot State (C) Total Interrupt 1min 5min
15min DRAM (MB) Heap Buffer
0
Online 43 41
2 2048 49 14
1
Online 43 41
2
2048 49 14
2
Online 43 41
2
2048 49 14
This issue affects Junos OS on MX Series:
* All versions before 21.2R3-S7,
* from 21.4 before 21.4R3-S6,
* from 22.1 before 22.1R3-S5,
* from 22.2 before 22.2R3-S3,
* from 22.3 before 22.3R3-S2,
* from 22.4 before 22.4R3,
* from 23.2 before 23.2R2,
* from 23.4 before 23.4R2.
CVSS Score
7.1
EPSS Score
0.004
Published
2024-10-11
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.
CVSS Score
8.7
EPSS Score
0.01
Published
2024-10-11
An Uncontrolled Resource Consumption vulnerability in the H.323 ALG (Application Layer Gateway) of Juniper Networks Junos OS on SRX Series and MX Series with SPC3 and MS-MPC/MIC, allows an unauthenticated network-based attacker to send specific packets causing traffic loss leading to Denial of Service (DoS).
Continued receipt and processing of these specific packets will sustain the Denial of Service condition.
The memory usage can be monitored using the below command.
user@host> show usp memory segment sha data objcache jsf
This issue affects SRX Series and MX Series with SPC3 and MS-MPC/MIC:
* 20.4 before 20.4R3-S10,
* 21.2 before 21.2R3-S6,
* 21.3 before 21.3R3-S5,
* 21.4 before 21.4R3-S6,
* 22.1 before 22.1R3-S4,
* 22.2 before 22.2R3-S2,
* 22.3 before 22.3R3-S1,
* 22.4 before 22.4R3,
* 23.2 before 23.2R2.
CVSS Score
8.7
EPSS Score
0.005
Published
2024-07-11
An Improper Handling of Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows a network based, unauthenticated attacker to cause the RPD process to crash leading to a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, RPD crashes and restarts.
Continuous receipt of the malformed BGP UPDATE messages will create a sustained Denial of Service (DoS) condition for impacted devices.
This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations. This issue requires a remote attacker to have at least one established BGP session.
This issue affects:
Juniper Networks Junos OS:
* All versions earlier than 20.4R3-S9;
* 21.2 versions earlier than 21.2R3-S7;
* 21.3 versions earlier than 21.3R3-S5;
* 21.4 versions earlier than 21.4R3-S6;
* 22.1 versions earlier than 22.1R3-S4;
* 22.2 versions earlier than 22.2R3-S3;
* 22.3 versions earlier than 22.3R3-S2;
* 22.4 versions earlier than 22.4R3;
* 23.2 versions earlier than 23.2R2.
Juniper Networks Junos OS Evolved:
* All versions earlier than 21.2R3-S7;
* 21.3-EVO versions earlier than 21.3R3-S5;
* 21.4-EVO versions earlier than 21.4R3-S8;
* 22.1-EVO versions earlier than 22.1R3-S4;
* 22.2-EVO versions earlier than 22.2R3-S3;
* 22.3-EVO versions earlier than 22.3R3-S2;
* 22.4-EVO versions earlier than 22.4R3;
* 23.2-EVO versions earlier than 23.2R2.
CVSS Score
8.7
EPSS Score
0.006
Published
2024-07-11