A NULL Pointer Dereference vulnerability in the management daemon (mgd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, high-privileged attacker setting or deactivating a specific SSH configuration parameter to create a Denial of Service (DoS).

A local high-privileged user configuring or deactivating a specific 'system services ssh' configuration parameter can exploit a null pointer dereference in one of the functions used by SSH. The function attempts to dereference a null pointer when accessing certain configuration data, resulting in an mgd process crash and restart. Continued execution of these configuration commands will create a sustained Denial of Service (DoS) condition.

This issue affects: Junos OS:

from 22.3 before 22.3R3-S5; from 22.4 before 22.4R3-S10; from 23.2 before 23.2R2-S7; from 23.4 before 23.4R2-S8.

This issue does not affect Junos OS before 22.3R1.

Junos OS Evolved: from 22.3R1-EVO before 23.2R2-S7-EVO; from 23.4 before 23.4R2-S8-EVO.

This issue does not affect Junos OS Evolved before 22.3R1-EVO.

A Missing Authentication for Critical Function vulnerability in command processing of Juniper Networks Junos OS allows a privileged local attacker to gain access to Linux-based line cards as root.

This issue affects systems running Junos OS using Linux-based line cards. Affected line cards include: MPC7, MPC8, MPC9, MPC10, MPC11 LC2101, LC2103 LC480, LC4800, LC9600 MX304 (built-in FPC) MX-SPC3 SRX5K-SPC3 EX9200-40XS

FPC3-PTX-U2, FPC3-PTX-U3 FPC3-SFF-PTX LC1101, LC1102, LC1104, LC1105

This issue affects Junos OS:

all versions before 22.4R3-S8,  from 23.2 before 23.2R2-S6,  from 23.4 before 23.4R2-S6,  from 24.2 before 24.2R2-S3,  from 24.4 before 24.4R2, from 25.2 before 25.2R2.

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS on MX Series allows adjacent subscribers to bypass configured firewall filters.

On MX Series devices with MPC10/11, LC4800/9600, and MX304 with subscribers configured on static interfaces, ingress firewall filters are not enforced, so that neither protocol level nor upstream bandwidth limitation are in effect.

This issue affects Junos OS on MX with MPC10/11, LC4800/9600/4802, and MX304:

23.2 versions from 23.2R2-S1 before 23.2R2-S7, 23.4 versions from 23.4R2 before 23.4R2-S7, 24.2 versions before 24.2R2-S3, 24.4 versions before 24.4R2-S2, 25.2 versions before 25.2R2.

A Return of Pointer Value Outside of Expected Range vulnerability in the fileio library of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privilged attacker to cause a Denial-of-Service (DoS).

On EX Series, QFX Series and MX Series a low-privileged attacker issuing a specific 'show l2-learning' or 'show ethernet-switching' command will cause an l2ald crash which will lead to a temporary service impact for all layer 2 services until the process has automatically restarted.

This issue affects EX Series, QFX Series, MX Series: Junos OS:

all versions before 23.2R2-S7, 23.4 versions before 23.4R2-S7, 24.2 versions before 24.2R2, 24.4 versions before 24.4R1-S2.

Junos OS Evolved: all versions before 23.2R2-S7-EVO, 23.4 versions before 23.4R2-S8-EVO, 24.2 versions before 24.2R2-EVO, 24.4 versions before 24.4R1-S3-EVO.

A Missing Authorization vulnerability in the CLI of Juniper Networks Junos OS on EX Series allows a local, authenticated attacker to cause a Denial-of-Service (DoS).

On EX2300, EX4000, EX4100, EX4300-MP (Multigigabit) and EX4400 switches, an authenticated, local attacker with no specific permissions or class can execute a specific, privileged CLI 'request' command which will cause complete traffic impact until the system automatically recovers.

This issue affects Junos OS on EX2300, EX4000, EX4100, EX4300-MP (Multigigabit) and EX4400:

23.2R2 versions before 23.2R2-S6, 23.4 versions before 23.4R2-S8, 24.2 versions before 24.2R2-S4, 24.4 versions before 24.4R2-S3, 25.2 versions before 25.2R2, 25.4 versions before 25.4R1-S1.

An Improper Check for Unusual or Exceptional Conditions vulnerability in the routing protocol daemon (RPD) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker sending a specific BGP update over an established BGP session to cause a Denial-of-Service (DoS).

Upon receipt of a specifically malformed non-inet/inet6 unicast BGP update, an RPD crash and restart is triggered, which will cause a complete service outage until routing has reconverged. The rpd crash occurs before the update can be readvertised, so there is no downstream propagation.

This issue affects:

Junos OS versions 25.2 before 25.2R2;

Junos OS Evolved versions 25.2 before 25.2R2-EVO.

This issue doesn't affect Junos OS versions before 25.2R1 nor Junos OS Evolved versions before 25.2R1-EVO.

A Use of Incorrectly-Resolved Name or Reference vulnerability in the URL filtering plugin of Juniper Networks Junos OS on MX Series allows an unauthenticated, network-based attacker to bypass web filtering and access downstream resources that should be unreachable.

If an MX Series device is configured with web filtering, and an attacker sends a request with a specifically formatted URL, this request will get forwarded despite the system being configured to block it. In turn, an attacker can access downstream resources that are expected to be unreachable.

This issue affects Junos OS on MX Series:

all versions before 23.2R2-S7, 23.4 versions before 23.4R2-S8, 24.2 versions before 24.2R2-S5, 24.4 versions before 24.4R2-S4, 25.2 versions before 25.2R2-S1, 25.4 versions before 25.4R1-S2, 25.4R2.

An Out-of-bounds Write vulnerability in the SNMP daemon (snmpd) of Juniper Networks Junos OS and Junos OS Evolved allows an authenticated network-based attacker sending specific valid SNMPv3 queries to trigger a memory leak. Over time, continuous receipt of these queries will result in snmpd process memory exhaustion, resulting in a process crash and restart, impacting the ability to monitor the system via SNMP.

Memory usage can be monitored using the following command:

user@device> show system processes extensive | match snmpd

This issue affects:

Junos OS:

all versions 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; from 23.4 before 23.4R2.

Junos OS Evolved: all versions before 21.2R3-S8-EVO; from 21.4 before 21.4R3-S7-EVO; all versions of 22.1-EVO, from 22.2 before 22.2R3-S4-EVO; from 22.3 before 22.3R3-S3-EVO; all versions of 22.4-EVO, from 23.2 before 23.2R2-EVO; from 23.4 before 23.4R2-EVO.

An Incorrect Authorization vulnerability in the web server of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to reach the

Juniper Web Device Manager

(J-Web).

When Juniper Secure connect (JSC) is enabled on specific interfaces, or multiple interfaces are configured for J-Web, the J-Web UI is reachable over more than the intended interfaces. This issue affects Junos OS:

all versions before 21.4R3-S9, 22.2 versions before 22.2R3-S5, 22.4 versions before 22.4R3-S5, 23.2 versions before 23.2R2-S3, 23.4 versions before 23.4R2-S5, 24.2 versions before 24.2R2.

An Improper Isolation or Compartmentalization vulnerability in the kernel of Juniper Networks Junos OS allows a local attacker with high privileges to compromise the integrity of the device.

A local attacker with access to the shell is able to inject arbitrary code which can compromise an affected device. This issue is not exploitable from the Junos CLI. This issue affects Junos OS:

All versions before 21.2R3-S9, 21.4 versions before 21.4R3-S10,  22.2 versions before 22.2R3-S6,  22.4 versions before 22.4R3-S6,  23.2 versions before 23.2R2-S3,  23.4 versions before 23.4R2-S4, 24.2 versions before 24.2R1-S2, 24.2R2.

A Missing Authentication for Critical Function vulnerability combined with a Generation of Error Message Containing Sensitive Information vulnerability in J-Web of Juniper Networks Junos OS on SRX Series and EX Series allows an unauthenticated, network-based attacker to access sensitive system information.

When a user logs in, a temporary file which contains the configuration of the device (as visible to that user) is created in the /cache folder. An unauthenticated attacker can then attempt to access such a file by sending a specific request to the device trying to guess the name of such a file. Successful exploitation will reveal configuration information.

This issue affects Juniper Networks Junos OS on SRX Series and EX Series: 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-S5; 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 23.2R1-S2, 23.2R2.

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in J-Web of Juniper Networks Junos OS on SRX Series and EX Series allows an attacker to construct a URL that when visited by another user enables the attacker to execute commands with the target's permissions, including an administrator.

A specific invocation of the emitdebugnote method in webauthoperation.php will echo back the data it receives.

This issue affects Juniper Networks Junos OS on SRX Series and EX Series: All versions earlier than 20.4R3-S10; 21.2 versions earlier than 21.2R3-S8; 21.4 versions earlier than 21.4R3-S6; 22.1 versions earlier than 22.1R3-S5; 22.2 versions earlier than 22.2R3-S3; 22.3 versions earlier than 22.3R3-S2; 22.4 versions earlier than 22.4R3-S1; 23.2 versions earlier than 23.2R2; 23.4 versions earlier than 23.4R2.

A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity.

With a specific request to

webauthoperation.php

that doesn't require authentication, an attacker is able to upload and download arbitrary files via J-Web, leading to a loss of

integrity or confidentiality, which may allow chaining to other vulnerabilities.

This issue affects Juniper Networks Junos OS on SRX Series:

21.2 versions prior to 21.2R3-S8; 21.4

versions prior to

21.4R3-S6; 22.1

versions prior to

22.1R3-S5; 22.2

versions prior to

22.2R3-S3; 22.3

versions prior to

22.3R3-S2; 22.4 versions prior to 22,4R2-S2, 22.4R3; 23.2 versions prior to

23.2R1-S2, 23.2R2.

A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity.

With a specific request to user.php that doesn't require authentication an attacker is able to upload arbitrary files via J-Web, leading to a loss of

integrity

for a certain

part of the file system, which may allow chaining to other vulnerabilities.

This issue affects Juniper Networks Junos OS on SRX Series:

All versions prior to 20.4R3-S8; 21.1 versions 21.1R1 and later; 21.2 versions prior to 21.2R3-S6; 21.3 versions

prior to

21.3R3-S5; 21.4 versions

prior to

21.4R3-S5; 22.1 versions

prior to

22.1R3-S3; 22.2 versions

prior to

22.2R3-S2; 22.3 versions

prior to

22.3R2-S2, 22.3R3; 22.4 versions

prior to

22.4R2-S1, 22.4R3.

An Improper Input Validation vulnerability in Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker, sending a specific genuine BGP packet in an already established BGP session to reset only that session causing a Denial of Service (DoS).

An attacker repeatedly sending the packet will sustain the Denial of Service (DoS).This issue affects Junos OS:

25.2 versions before 25.2R2

This issue does not affect Junos OS versions before 25.2R1.

This issue affects Junos OS Evolved: 25.2-EVO versions before 25.2R2-EVO

This issue does not affect Junos OS Evolved versions before 25.2R1-EVO.

eBGP and iBGP are affected. IPv4 and IPv6 are affected.

An OS Command Injection vulnerability in the CLI processing of Juniper Networks Junos OS and Junos OS Evolved allows a local, high-privileged attacker executing specific, crafted CLI commands to inject arbitrary shell commands as root, leading to a complete compromise of the system.

Certain 'set system' commands, when executed with crafted arguments, are not properly sanitized, allowing for arbitrary shell injection. These shell commands are executed as root, potentially allowing for complete control of the vulnerable system. This issue affects:

Junos OS:

all versions before 22.4R3-S8,  from 23.2 before 23.2R2-S5,  from 23.4 before 23.4R2-S7,  from 24.2 before 24.2R2-S2,  from 24.4 before 24.4R2,  from 25.2 before 25.2R2;

Junos OS Evolved:

all versions before 22.4R3-S8-EVO,  from 23.2 before 23.2R2-S5-EVO,  from 23.4 before 23.4R2-S7-EVO,  from 24.2 before 24.2R2-S2-EVO,  from 24.4 before 24.4R2-EVO,  from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.

A UNIX Symbolic Link (Symlink) Following vulnerability in the CLI of Juniper Networks Junos OS allows a local, authenticated attacker with low privileges to escalate their privileges to root which will lead to a complete compromise of the system.

When after a user has performed a specific 'file link ...' CLI operation, another user commits (unrelated configuration changes), the first user can login as root.

This issue affects Junos OS: all versions before 23.2R2-S7, 23.4 versions before 23.4R2-S6, 24.2 versions before 24.2R2-S3, 24.4 versions before 24.4R2-S2, 25.2 versions before 25.2R2.

This issue does not affect versions 25.4R1 or later.

An Incorrect Synchronization vulnerability in the management daemon (mgd) of Juniper Networks Junos OS and Junos OS Evolved allows a network-based attacker with low privileges to cause a complete Denial-of-Service (DoS) of the management plane.

When NETCONF sessions are quickly established and disconnected, a locking issue causes mgd processes to hang in an unusable state. When the maximum number of mgd processes has been reached, no new logins are possible. This leads to the inability to manage the device and requires a power-cycle to recover.

This issue can be monitored by checking for mgd processes in lockf state in the output of 'show system processes extensive':

user@host> show system processes extensive | match mgd <pid> root       20   0 501M 4640K lockf   1 0:01 0.00% mgd

If the system still can be accessed (either via the CLI or as root, which might still be possible as last resort as this won't invoke mgd), mgd processes in this state can be killed with 'request system process terminate <PID>' from the CLI or with 'kill -9 <PID>' from the shell.

This issue affects:

Junos OS:

23.4 versions before 23.4R2-S4, 24.2 versions before 24.2R2-S1, 24.4 versions before 24.4R1-S3, 24.4R2;

This issue does not affect Junos OS versions before 23.4R1;

Junos OS Evolved:

23.4 versions before 23.4R2-S5-EVO, 24.2 versions before 24.2R2-S1-EVO, 24.4 versions before 24.4R1-S3-EVO, 24.4R2-EVO.

This issue does not affect Junos OS Evolved versions before 23.4R1-EVO;

A Missing Release of Memory after Effective Lifetime vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a memory leak ultimately leading to a Denial of Service (DoS).

In an EVPN-MPLS scenario, routes learned from remote multi-homed Provider Edge (PE) devices are programmed as ESI routes. Due to a logic issue in the l2ald memory management, memory allocated for these routes is not released when there is churn for these routes. As a result, memory leaks in the l2ald process which will ultimately lead to a crash and restart of l2ald.

Use the following command to monitor the memory consumption by l2ald:

user@device> show system process extensive | match "PID|l2ald"

This issue affects:

Junos OS:

all versions before 22.4R3-S5, 23.2 versions before 23.2R2-S3, 23.4 versions before 23.4R2-S4, 24.2 versions before 24.2R2;

Junos OS Evolved:

all versions before 22.4R3-S5-EVO, 23.2 versions before 23.2R2-S3-EVO, 23.4 versions before 23.4R2-S4-EVO, 24.2 versions before 24.2R2-EVO.

A Missing Authorization vulnerability in the CLI of Juniper Networks Junos OS and Junos OS Evolved allows a local user with low privileges to read sensitive information.

A local user with low privileges can execute the CLI command 'show mgd' with specific arguments which will expose sensitive information.

This issue affects

Junos OS: all versions before 22.4R3-S8, 23.2 versions before 23.2R2-S6, 23.4 versions before 23.4R2-S6, 24.2 versions before 24.2R2-S4, 24.4 versions before 24.4R2-S1, 25.2 version before 25.2R1-S2, 25.2R2;

Junos OS Evolved: all versions before 23.2R2-S6-EVO, 23.4 version before 23.4R2-S6-EVO, 24.2 version before 24.2R2-S4-EVO, 24.4 versions before 24.4R2-S1-EVO, 25.2 versions before 25.2R2-EVO.

An Execution with Unnecessary Privileges vulnerability in the User Interface (UI) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low-privileged attacker to gain root privileges, thus compromising the system.

When a configuration that allows unsigned Python op scripts is present on the device, a non-root user is able to execute malicious op scripts as a root-equivalent user, leading to privilege escalation.

This issue affects Junos OS:

All versions before 22.4R3-S7,  from 23.2 before 23.2R2-S4,  from 23.4 before 23.4R2-S6, from 24.2 before 24.2R1-S2, 24.2R2,  from 24.4 before 24.4R1-S2, 24.4R2;

Junos OS Evolved:

All versions before 22.4R3-S7-EVO,  from 23.2 before 23.2R2-S4-EVO,  from 23.4 before 23.4R2-S6-EVO, from 24.2 before 24.2R2-EVO,  from 24.4 before 24.4R1-S1-EVO, 24.4R2-EVO.

A NULL Pointer Dereference vulnerability in the chassis daemon (chassisd) of Juniper Networks Junos OS on MX, SRX and EX Series allows a local attacker with low privileges to cause a Denial-of-Service (DoS).

When a user executes the 'show chassis' command with specifically crafted options, chassisd will crash and restart. Due to this all components but the Routing Engine (RE) in the chassis are reinitialized, which leads to a complete service outage, which the system automatically recovers from.

This issue affects:

Junos OS on MX, SRX and EX Series, except MX10000 Series and MX304:

all versions before 22.4R3-S8, 23.2 versions before 23.2R2-S5, 23.4 versions before 23.4R2-S6, 24.2 versions before 24.2R2-S2, 24.4 versions before 24.4R2.

An Improper Handling of Exceptional Conditions vulnerability in packet processing of Juniper Networks Junos OS allows an unauthenticated, network-adjacent attacker sending a specifically malformed ICMP packet to cause an FPC to crash and restart, resulting in a Denial of Service (DoS).

When an ICMP packet is received with a specifically malformed IP header value, the FPC receiving the packet crashes and restarts. Due to the specific type of malformed packet, adjacent upstream routers would not forward the packet, limiting the attack surface to adjacent networks.

This issue only affects ICMPv4. ICMPv6 is not vulnerable to this issue.

This issue does not affect AFT-based line cards such as the MPC10, MPC11, LC4800, LC9600, and MX304.

This issue affects Junos OS:

all versions before 21.2R3-S9,  from 21.4 before 21.4R3-S10,  from 22.2 before 22.2R3-S7,  from 22.3 before 22.3R3-S4,  from 22.4 before 22.4R3-S5,  from 23.2 before 23.2R2-S3,  from 23.4 before 23.4R2-S3,  from 24.2 before 24.2R1-S2, 24.2R2.

A Heap-based Buffer Overflow vulnerability in the flexible PIC concentrator (FPC) of Juniper Networks Junos OS on EX2300, EX3400, EX4100, EX4300, EX4300MP, EX4400, EX4600, EX4650-48Y, and QFX5k Series allows an attacker to send a specific DHCP packet to the device, leading to an FPC crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition.

Under a rare timing scenario outside the attacker's control, memory corruption may be observed when DHCP Option 82 is enabled, leading to an FPC crash and affecting packet forwarding. Due to the nature of the heap-based overflow, exploitation of this vulnerability could also lead to remote code execution within the FPC, resulting in complete control of the vulnerable component. This issue affects Junos OS on EX2300, EX3400, EX4100, EX4300, EX4300MP, EX4400, EX4600, EX4650-48Y, and QFX5k Series:

All versions before 21.4R3-S9,  from 22.2 before 22.2R3-S5,  from 22.4 before 22.4R3-S5,  from 23.2 before 23.2R2-S3,  from 23.4 before 23.4R2-S3,  from 24.2 before 24.2R2.

An Incorrect Permission Assignment for Critical Resource vulnerability in line card script processing of Juniper Networks Junos OS allows a local, low-privileged user to install scripts to be executed as root, leading to privilege escalation.

A local user with access to the local file system can copy a script to the router in a way that will be executed as root, as the system boots. Execution of the script as root can lead to privilege escalation, potentially providing the adversary complete control of the system.

This issue only affects specific line cards, such as the MPC10, MPC11, LC4800, LC9600, MX304-LMIC16, SRX4700, and EX9200-15C.

This issue affects Junos OS: from 23.2 before 23.2R2-S4,  from 23.4 before 23.4R2-S5,  from 24.2 before 24.2R2-S1,  from 24.4 before 24.4R1-S3, 24.4R2.

This issue does not affect versions prior to 23.1R2.

An Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in the CLI of Juniper Networks Junos OS and Junos OS Evolved allows a high privileged, local attacker to escalated their privileges to root.

When a user provides specifically crafted arguments to the 'request system logout' command, these will be executed as root on the shell, which can completely compromise the device. This issue affects:

Junos OS:

all versions before 21.2R3-S9, 21.4 versions before 21.4R3-S8, 22.2 versions before 22.2R3-S6, 22.3 versions before 22.3R3-S3, 22.4 versions before 22.4R3-S6, 23.2 versions before 23.2R2-S1, 23.4 versions before 23.4R1-S2, 23.4R2;

Junos OS Evolved:

all versions before 22.4R3-S6-EVO, 23.2-EVO versions before 23.2R2-S1-EVO, 23.4-EVO versions before 23.4R1-S2-EVO, 23.4R2-EVO.

A UI Discrepancy for Security Feature

vulnerability in the UI of Juniper Networks Junos OS on VM Host systems allows a network-based, unauthenticated attacker to access the device.

On VM Host Routing Engines (RE), even if the configured public key for root has been removed, remote users which are in possession of the corresponding private key can still log in as root. This issue affects Junos OS:

all versions before 22.2R3-S7, 22.4 versions before 22.4R3-S5, 23.2 versions before 23.2R2-S3, 23.4 versions before 23.4R2-S3, 24.2 versions before 24.2R1-S2, 24.2R2.

A Use After Free vulnerability was identified in the 802.1X authentication daemon (dot1xd) of Juniper Networks Junos OS and Junos OS Evolved that could allow an authenticated, network-adjacent attacker flapping a port to crash the dot1xd process, leading to a Denial of Service (DoS), or potentially execute arbitrary code within the context of the process running as root.

The issue is specific to the processing of a change in authorization (CoA) when a port bounce occurs. A pointer is freed but was then referenced later in the same code path. Successful exploitation is outside the attacker's direct control due to the specific timing of the two events required to execute the vulnerable code path.

This issue affects systems with 802.1X authentication port-based network access control (PNAC) enabled. This issue affects:

Junos OS:

from 23.2R2-S1 before 23.2R2-S5,  from 23.4R2 before 23.4R2-S6,  from 24.2 before 24.2R2-S3,  from 24.4 before 24.4R2-S1,  from 25.2 before 25.2R1-S2, 25.2R2;

Junos OS Evolved:

from 23.2R2-S1 before 23.2R2-S5-EVO,  from 23.4R2 before 23.4R2-S6-EVO,  from 24.2 before 24.2R2-S3-EVO,  from 24.4 before 24.4R2-S1-EVO,  from 25.2 before 25.2R1-S2-EVO, 25.2R2-EVO.

A Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in the method to collect FPC Ethernet firmware statistics of Juniper Networks Junos OS on MX10k Series allows a local, low-privileged attacker executing the 'show system firmware' CLI command to cause an LC480 or LC2101 line card to reset.

On MX10k Series systems with LC480 or LC2101 line cards, repeated execution of the 'show system firmware' CLI command can cause the line card to crash and restart. Additionally, some time after the line card crashes, chassisd may also crash and restart, generating a core dump.This issue affects Junos OS on MX10k Series:

all versions before 21.2R3-S10,  from 21.4 before 21.4R3-S9,  from 22.2 before 22.2R3-S7,  from 22.4 before 22.4R3-S6,  from 23.2 before 23.2R2-S2,  from 23.4 before 23.4R2-S3,  from 24.2 before 24.2R2.

An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS on EX4k Series and QFX5k Series platforms allows an unauthenticated network-adjacent attacker flapping an interface to cause traffic between VXLAN Network Identifiers (VNIs) to drop, leading to a Denial of Service (DoS).

On all EX4k and QFX5k platforms, a link flap in an

EVPN-VXLAN configuration Link Aggregation Group (LAG) results in Inter-VNI traffic dropping when there are multiple load-balanced next-hop routes for the same destination.

This issue is only applicable to systems that support EVPN-VXLAN Virtual Port-Link Aggregation Groups (VPLAG), such as the QFX5110, QFX5120, QFX5200, EX4100, EX4300, EX4400, and EX4650.

Service can only be restored by restarting the affected FPC via the 'request chassis fpc restart slot <slot-number>' command.

This issue affects Junos OS

on EX4k and QFX5k Series:

all versions before 21.4R3-S12,  all versions of 22.2 from 22.4 before 22.4R3-S8,  from 23.2 before 23.2R2-S5,  from 23.4 before 23.4R2-S5,  from 24.2 before 24.2R2-S3, from 24.4 before 24.4R2.