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CVE-2024-39553

Junos OS Evolved: Receipt of arbitrary data when sampling service is enabled, leads to partial Denial of Service (DoS).

MEDIUM
6.5
CVSS Score
Published: July 11, 2024 at 04:32 PM UTC
Updated: June 17, 2026 at 07:42 AM UTC
2 products affected across 2 vendorsJunos OS EvolvedJunos OS Evolved

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

An Exposure of Resource to Wrong Sphere vulnerability in the sampling service of Juniper Networks Junos OS Evolved allows an unauthenticated network-based attacker to send arbitrary data to the device, which leads msvcsd process to crash with limited availability impacting Denial of Service (DoS) and allows unauthorized network access to the device, potentially impacting system integrity. This issue only happens when inline jflow is configured. This does not impact any forwarding traffic. The impacted services MSVCS-DB app crashes momentarily and recovers by itself. This issue affects Juniper Networks Junos OS Evolved:  * 21.4 versions earlier than 21.4R3-S7-EVO;  * 22.2 versions earlier than 22.2R3-S3-EVO; * 22.3 versions earlier than 22.3R3-S2-EVO; * 22.4 versions earlier than 22.4R3-EVO; * 23.2 versions earlier than 23.2R1-S2-EVO, 23.2R2-EVO.

Affected

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

Junos OS Evolved· Juniper
95%
21.4 ≤ v < 21.4r3-s722.2 ≤ v < 22.2r3-s322.3 ≤ v < 22.3r3-s222.4 ≤ v < 22.4r323.2 ≤ v < 23.23r1-s221.421.4 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-s321.4 r3-s421.4 r3-s521.4 r3-s622.222.2 r122.2 r1-s122.2 r1-s222.2 r222.2 r2-s122.2 r2-s222.2 r322.2 r3-s122.2 r3-s222.322.3 r122.3 r1-s122.3 r1-s222.3 r222.3 r2-s122.3 r2-s222.3 r322.3 r3-s122.422.4 r122.4 r1-s122.4 r1-s222.4 r222.4 r2-s122.4 r2-s223.223.2 r123.2 r1-s123.2 r2
Affected range stops below 21.4r3-s7, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.2r3-s3, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.3r3-s2, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.4r3, so it looks safe — our inference, not a vendor statement
Affected range stops below 23.23r1-s2, so it looks safe — our inference, not a vendor statement
Junos OS Evolved· Juniper Networks
60%
21.4-EVO ≤ v < 21.4R3-S7-EVO22.2-EVO ≤ v < 22.2R3-S3-EVO22.3-EVO ≤ v < 22.3R3-S2-EVO22.4-EVO ≤ v < 22.4R3-EVO23.2-EVO ≤ v < 23.2R1-S2-EVO, 23.2R2-EVO21.4-EVO22.2-EVO22.3-EVO22.4-EVO23.2-EVO
Affected range stops below 21.4R3-S7-EVO, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.2R3-S3-EVO, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.3R3-S2-EVO, so it looks safe — our inference, not a vendor statement
Affected range stops below 22.4R3-EVO, so it looks safe — our inference, not a vendor statement
Affected range stops below 23.2R1-S2-EVO, 23.2R2-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 (1)

Vendor AdvisoryExploit
Source: [email protected]
https://supportportal.juniper.net/JSA79101

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

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

CVSS

6.5MEDIUMjuniper
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-668

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