CVE-2024-39515Network attack vector

Denial of service via malformed BGP packet

Published Oct 9, 2024 · Updated Oct 11, 2024

Denial of service in Juniper Networks Junos OS and Junos OS Evolved allows remote attackers to crash rpd with a malformed BGP packet. With BGP traceoptions enabled, rpd improperly validates packet consistency while processing an established iBGP or eBGP session, causing a crash and restart. Repeated packets can sustain the outage, and in some cases rpd does not restart without manual intervention; systems without BGP traceoptions are unaffected.

CVSS severity7.5
High
EPSS probability0.46%
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

Denial of service in Juniper Networks Junos OS and Junos OS Evolved allows remote attackers to crash rpd with a malformed BGP packet. With BGP traceoptions enabled, rpd improperly validates packet consistency while processing an established iBGP or eBGP session, causing a crash and restart. Repeated packets can sustain the outage, and in some cases rpd does not restart without manual intervention; systems without BGP traceoptions are unaffected.

The record

CVE
CVE-2024-39515
Published
Oct 9, 2024
Updated
Oct 11, 2024
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-1288, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 9, 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-S8
  2. Affected versionversion=0 <21.4R3-S8-EVO
  3. Affected versionversion=22.2 <22.2R3-S5
  4. Affected versionversion=22.2-EVO <22.2R3-S5-EVO
  5. Affected versionversion=22.3 <22.3R3-S4
  6. Affected versionversion=22.3-EVO <22.3R3-S4-EVO
  7. Affected versionversion=22.4 <22.4R3-S3
  8. Affected versionversion=22.4-EVO <22.4R3-S3-EVO
  9. Affected versionversion=23.2 <23.2R2-S2
  10. Affected versionversion=23.2-EVO <23.2R2-S2-EVO
  11. Affected versionversion=23.4 <23.4R2
  12. Affected versionversion=23.4-EVO <23.4R2-EVO

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <21.4R3-S8; version=0 <21.4R3-S8-EVO; version=22.2 <22.2R3-S5; version=22.2-EVO <22.2R3-S5-EVO; version=22.3 <22.3R3-S4; version=22.3-EVO <22.3R3-S4-EVO; version=22.4 <22.4R3-S3; version=22.4-EVO <22.4R3-S3-EVO; version=23.2 <23.2R2-S2; version=23.2-EVO <23.2R2-S2-EVO; version=23.4 <23.4R2; version=23.4-EVO <23.4R2-EVO
Juniper Networks · Junos OSversion=0 <21.4R3-S8; 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

8.7Juniper Networks, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:U
7.5Juniper Networks, Inc.CVSS:3.1/AV:N/AC:L/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-1288Improper Validation of Consistency within Input
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