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CVE-2024-47493

MEDIUM
Published 2024-10-11T15:24:02.438Z
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CVSS Score

V3.1
6.5
/10
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.001
probability
of exploitation in the wild

There is a 0.1% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.296
Higher than 29.6% of all CVEs

Attack Vector Metrics

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Description

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Juniper Networks

Junos OS

Affected Versions:

0 21.4 22.1 22.2 22.3 22.4 23.2 23.4

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-fpxg-3hxf-5mvr

Advisory Details

A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of the Juniper Networks Junos OS on the SRX5K, SRX4600 and 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 SRX5K, SRX4600 and 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 Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2024-47493
WEB https://supportportal.juniper.net
WEB https://www.juniper.net/documentation/us/en/software/junos/interfaces-link-multilink/topics/topic-map/link-multilink-services-understanding.html#id-multilink-interfaces-on-channelized-mics-overview

Advisory provided by GitHub Security Advisory Database. Published: October 11, 2024, Modified: November 8, 2024

References

https://supportportal.juniper.net/
https://www.juniper.net/documentation/us/en/software/junos/interfaces-link-multilink/topics/topic-map/link-multilink-services-understanding.html#id-multilink-interfaces-on-channelized-mics-overview
Published: 2024-10-11T15:24:02.438Z
Last Modified: 2024-11-08T17:17:27.242Z
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