CVE-2024-30395Network attack vector

Routing daemon restart via malformed BGP attribute

Published Apr 12, 2024 · Updated Aug 2, 2024

Improper input validation in Juniper Networks Junos OS and Junos OS Evolved allows remote attackers to restart rpd via a BGP update. RPD accepts a tunnel encapsulation attribute containing a specifically malformed TLV without rejecting it, then crashes and automatically restarts. Reachability requires an established BGP session with the target; the resulting service interruption affects routing-protocol processing.

CVSS severity8.7
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Juniper Networks Junos OS and Junos OS Evolved allows remote attackers to restart rpd via a BGP update. RPD accepts a tunnel encapsulation attribute containing a specifically malformed TLV without rejecting it, then crashes and automatically restarts. Reachability requires an established BGP session with the target; the resulting service interruption affects routing-protocol processing.

The record

CVE
CVE-2024-30395
Published
Apr 12, 2024
Updated
Aug 2, 2024
Vendor
Juniper Networks
Product
Junos OS Evolved
Classifications
CWE-1287, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 12, 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-s7
  2. Affected versionversion=0 <21.2R3-S7-EVO
  3. Affected versionversion=21.3 <21.3r3-s5
  4. Affected versionversion=21.3-EVO <21.3R3-S5-EVO
  5. Affected versionversion=21.4 <21.4r3-s5
  6. Affected versionversion=21.4-EVO <21.4R3-S5-EVO
  7. Affected versionversion=22.2 <22.2.r3-s3
  8. Affected versionversion=22.2-EVO <22.2R3-S3-EVO
  9. Affected versionversion=22.3 <22.3r3-s2
  10. Affected versionversion=22.3-EVO <22.3R3-S2-EVO
  11. Affected versionversion=22.4 <22.4r3
  12. Affected versionversion=22.4-EVO <22.4R3-EVO
  13. Affected versionversion=23.2 <23.2r2
  14. Affected versionversion=23.2 <23.r1-s2
  15. Affected versionversion=23.2-EVO <23.2R1-S2-EVO, 23.2R2-EVO

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Juniper Networks · Junos OS Evolvedversion=0 <21.2r3-s7; version=0 <21.2R3-S7-EVO; version=21.3 <21.3r3-s5; version=21.3-EVO <21.3R3-S5-EVO; version=21.4 <21.4r3-s5; version=21.4-EVO <21.4R3-S5-EVO; version=22.2 <22.2.r3-s3; version=22.2-EVO <22.2R3-S3-EVO; version=22.3 <22.3r3-s2; version=22.3-EVO <22.3R3-S2-EVO; version=22.4 <22.4r3; version=22.4-EVO <22.4R3-EVO; version=23.2 <23.2r2; version=23.2 <23.r1-s2; version=23.2-EVO <23.2R1-S2-EVO, 23.2R2-EVO
Juniper Networks · Junos OSversion=0 <21.2R3-S7; version=21.3 <21.3R3-S5; version=21.4 <21.4R3-S5; version=22.1 <22.1R3-S5; version=22.2 <22.2R3-S3; version=22.3 <22.3R3-S2; version=22.4 <22.4R3; version=23.2 <23.2R1-S2, 23.2R2

Published CVSS scores

7.5Juniper NetworksCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.7Juniper NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

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.

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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-1287Improper Validation of Specified Type of Input
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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