vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2024-30390

Junos OS Evolved: Connection limits is not being enforced while the resp. rate limit is being enforced

MEDIUM
5.3
CVSS Score
Published: April 12, 2024 at 03:24 PM UTC
Updated: June 17, 2026 at 07:26 AM UTC
2 products affected across 2 vendorsJunos OS EvolvedJunos OS Evolved

Using Junos OS Evolved by Juniper Networks?

Get instant alerts when new vulnerabilities affect Junos OS Evolved - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM5.3
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

An Improper Restriction of Excessive Authentication Attempts vulnerability in Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a limited Denial of Service (DoS) to the management plane. When an incoming connection was blocked because it exceeded the connections-per-second rate-limit, the system doesn't consider existing connections anymore for subsequent connection attempts so that the connection limit can be exceeded. This issue affects Junos OS Evolved: * All versions before 21.4R3-S4-EVO, * 22.1-EVO versions before 22.1R3-S3-EVO, * 22.2-EVO versions before 22.2R3-S2-EVO,  * 22.3-EVO versions before 22.3R2-S1-EVO, 22.3R3-EVO.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Junos OS Evolved· Juniper
95%
v < 21.421.421.4 r121.4 r1-s121.4 r1-s221.4 r221.4 r2-s121.4 r2-s221.4 r321.4 r3-s121.4 r3-s221.4 r3-s322.122.1 r122.1 r1-s122.1 r1-s222.1 r222.1 r2-s122.1 r322.1 r3-s122.1 r3-s222.222.2 r122.2 r1-s122.2 r1-s222.2 r222.2 r2-s122.2 r2-s222.2 r322.2 r3-s122.322.3 r122.3 r1-s122.3 r1-s222.3 r2
Affected range stops below 21.4, so it looks safe — our inference, not a vendor statement
Junos OS Evolved· Juniper Networks
60%
v < 21.4R3-S4-EVO22.1-EVO ≤ v < 22.1R3-S3-EVO22.2-EVO ≤ v < 22.2R3-S2-EVO22.3-EVO ≤ v < 22.3R2-S1-EVO, 22.3R3-EVO22.1-EVO22.2-EVO22.3-EVO
Affected range stops below 21.4R3-S4-EVO, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.1R3-S3-EVO, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.2R3-S2-EVO, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.3R2-S1-EVO, 22.3R3-EVO, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: [email protected]
http://supportportal.juniper.net/JSA79183
Technical DescriptionIssue Tracking
Source: [email protected]
https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMjuniper
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-307

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card