CVE-2024-47494Network attack vector

FPC crash via AgentD sensor reaping race

Published Oct 11, 2024 · Updated Oct 11, 2024

A TOCTOU race in AgentD in Juniper Networks Junos OS allows remote attackers to crash and automatically restart an FPC. During telemetry polling, AgentD can reap a sensor that session-driven counter changes have already destroyed, corrupting memory. No authentication or user interaction is required, but exploitation requires established sessions undergoing counter changes; forwarding recovers automatically after the FPC restarts.

CVSS severity8.2
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

A TOCTOU race in AgentD in Juniper Networks Junos OS allows remote attackers to crash and automatically restart an FPC. During telemetry polling, AgentD can reap a sensor that session-driven counter changes have already destroyed, corrupting memory. No authentication or user interaction is required, but exploitation requires established sessions undergoing counter changes; forwarding recovers automatically after the FPC restarts.

The record

CVE
CVE-2024-47494
Published
Oct 11, 2024
Updated
Oct 11, 2024
Vendor
Juniper Networks
Product
Junos OS
Classifications
CWE-367, CAPEC-29, CAPEC-27, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 11, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <21.4R3-S9
  2. Affected versionversion=22.2 <22.2R3-S5
  3. Affected versionversion=22.3 <22.3R3-S4
  4. Affected versionversion=22.4 <22.4R3-S3
  5. Affected versionversion=23.2 <23.2R2-S2
  6. Affected versionversion=23.4 <23.4R2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OSversion=0 <21.4R3-S9; version=22.2 <22.2R3-S5; version=22.3 <22.3R3-S4; version=22.4 <22.4R3-S3; version=23.2 <23.2R2-S2; version=23.4 <23.4R2

Published CVSS scores

8.2Juniper NetworksCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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:A/V:X/RE:L/U:Green
5.9Juniper NetworksCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
CAPEC-29Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
CAPEC-27Leveraging Race Conditions via Symbolic Links
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo