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🛡️ CVE-2024-39531 — junos-os-evolved

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-229 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

An Improper Handling of Values vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX 7000 Series allows a network-based, unauthenticated attacker to cause a Denial-of-Service (DoS).

If a value is configured for DDoS bandwidth or burst parameters for any protocol in

a queue, all protocols which share the same queue will have

their bandwidth or burst value changed to the new value. If, for example, OSPF was configured with a certain bandwidth value, ISIS would also be limited to this value. So inadvertently either the control plane is open for a high level of specific traffic which was supposed to be limited to a lower value, or the limit for a certain protocol is so low that chances to succeed with a volumetric DoS attack are significantly increased. 

This issue affects Junos OS Evolved on ACX 7000 Series:

  • All versions before 21.4R3-S7-EVO,
  • 22.1 versions before 22.1R3-S6-EVO, 
  • 22.2 versions before 22.2R3-S3-EVO,
  • 22.3 versions before 22.3R3-S3-EVO, 
  • 22.4 versions before 22.4R3-S2-EVO,
  • 23.2 versions before 23.2R2-EVO,
  • 23.4

versions

before 23.4R1-S1-EVO, 23.4R2-EVO.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2024-39531 is classified as CWE-229: Improper Handling of Values. The product does not properly handle when the expected number of values for parameters, fields, or arguments is not provided in input, or if those values are undefined.

Affected software

CVE-2024-39531 is recorded against 1 package.

  • junos-os-evolved

Timeline and source

Published on 11 July 2024 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

supportportal.juniper.net
supportportal.juniper.net

Other advisories for this package

junos-os-evolved has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-229: Improper Handling of Values) in other software:

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-229
Public Exploit ✅ No
Source NVD
Published 2024-07-11
Updated 2026-08-20
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
junos-os-evolved — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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