CVE-2024-39548Network attack vector

Service interruption via packet-triggered aftmand memory leak

Published Jul 11, 2024 · Updated Aug 2, 2024

Uncontrolled resource consumption in the aftmand process in Junos OS Evolved allows remote attackers to exhaust memory with specific packets. The process fails to release memory while handling the triggering IPv4 or IPv6 packets, so repeated traffic steadily consumes resources. No authentication is required; affected processes do not recover automatically, and service restoration requires a manual restart.

CVSS severity7.1
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in the aftmand process in Junos OS Evolved allows remote attackers to exhaust memory with specific packets. The process fails to release memory while handling the triggering IPv4 or IPv6 packets, so repeated traffic steadily consumes resources. No authentication is required; affected processes do not recover automatically, and service restoration requires a manual restart.

The record

CVE
CVE-2024-39548
Published
Jul 11, 2024
Updated
Aug 2, 2024
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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 <21.2R3-S8-EVO
  2. Affected versionversion=21.3 <21.3R3-S5-EVO
  3. Affected versionversion=21.4 <21.4R3-S5-EVO
  4. Affected versionversion=22.1 <22.1R3-S4-EVO
  5. Affected versionversion=22.2 <22.2R3-S4
  6. Affected versionversion=22.3 <22.3R3-S3-EVO
  7. Affected versionversion=22.4 <22.4R2-S2-EVO
  8. Affected versionversion=22.4 <22.4R2-S2-EVO, 22.4R3-EVO
  9. Affected versionversion=22.4 <22.4R3-EVO
  10. Affected versionversion=23.2 <23.2R1-S1-EVO
  11. Affected versionversion=23.2 <23.2R1-S1-EVO, 23.2R2-EVO
  12. Affected versionversion=23.2 <23.2R2-EVO

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <21.2R3-S8-EVO; version=21.3 <21.3R3-S5-EVO; version=21.4 <21.4R3-S5-EVO; version=22.1 <22.1R3-S4-EVO; version=22.2 <22.2R3-S4; version=22.3 <22.3R3-S3-EVO; version=22.4 <22.4R2-S2-EVO; version=22.4 <22.4R2-S2-EVO, 22.4R3-EVO; version=22.4 <22.4R3-EVO; version=23.2 <23.2R1-S1-EVO; version=23.2 <23.2R1-S1-EVO, 23.2R2-EVO; version=23.2 <23.2R2-EVO

Published CVSS scores

7.5Juniper NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.1Juniper NetworksCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:U

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-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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