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Junos Os EvolvedOperating system · Juniper

CVE-2024-39553

MEDIUM · 6.5 CVSS v3.1 Published 2024-07-11
No fix yet
No fix has been published. The vendor has not shipped a fixed release or patch. You remain exposed.
See remediation →
74/100
Remediation priority · Elevated
Public exploit Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Junos Os EvolvedOperating system
Affected:= 21.4= 22.2= 22.3= 22.4= 23.2

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Recommended fix High confidence

Upgrade to 21.4R3-S7-EVO or later for 21.4 branch; 22.2R3-S3-EVO or later for 22.2 branch; 22.3R3-S2-EVO or later for 22.3 branch; 22.4R3-EVO or later for 22.4 branch; 23.2R1-S2-EVO or 23.2R2-EVO for 23.2 branch

  1. 1. Identify the current Junos OS Evolved version running on the device using 'show version'
  2. 2. Determine which version branch (21.4, 22.2, 22.3, 22.4, or 23.2) the device is running
  3. 3. Schedule a maintenance window for the upgrade operation
  4. 4. Download the appropriate fixed version from Juniper Networks support portal: 21.4R3-S7-EVO, 22.2R3-S3-EVO, 22.3R3-S2-EVO, 22.4R3-EVO, 23.2R1-S2-EVO, or 23.2R2-EVO
  5. 5. Upload the Junos OS Evolved software package to the device
  6. 6. Install the software upgrade using 'request system software add <package>' command
  7. 7. Reboot the device to complete the upgrade using 'request system reboot' command
  8. 8. After reboot, verify the new version is running with 'show version'
Caveat Standard Junos OS upgrade precautions apply - ensure compatibility with existing configurations and test in lab environment first

Generated from the published advisory — verify against the referenced sources before acting.

No vendor fix exists Junos Os Evolved has not published a patch for this.

There is no version to upgrade to and no patch to apply. Every affected install stays exposed until the vendor ships a fix — or somebody else builds one.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-39553 in production — separate from our analysis above.

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What belongs here
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