Improper Input Validation Vulnerability in Junos OS Evolved Leads to Denial of Service
CVE-2024-39513

5.5MEDIUM

Key Information:

Vendor

Juniper Networks
Status
Junos Os Evolved
Vendor
CVE Published:
10 July 2024

Badges

đź‘ľ Exploit Exists

What is CVE-2024-39513?

An Improper Input Validation vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved allows a local, low-privileged attacker to cause a Denial of Service (DoS).

When a specific "clear" command is run, the Advanced Forwarding Toolkit manager (evo-aftmand-bt or evo-aftmand-zx) crashes and restarts.

The crash impacts all traffic going through the FPCs, causing a DoS. Running the command repeatedly leads to a sustained DoS condition. This issue affects Junos OS Evolved: 

  • All versions before 20.4R3-S9-EVO, 
  • from 21.2-EVO before 21.2R3-S7-EVO, 
  • from 21.3-EVO before 21.3R3-S5-EVO, 
  • from 21.4-EVO before 21.4R3-S6-EVO, 
  • from 22.1-EVO before 22.1R3-S4-EVO, 
  • from 22.2-EVO before 22.2R3-S3-EVO, 
  • from 22.3-EVO before 22.3R3-S3-EVO, 
  • from 22.4-EVO before 22.4R3-EVO,
  • from 23.2-EVO before 23.2R2-EVO.

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Affected Version(s)

Junos OS Evolved 0 < 20.4R3-S9-EVO

Junos OS Evolved 21.2-EVO < 21.2R3-S7-EVO

Junos OS Evolved 21.3-EVO < 21.3R3-S5-EVO

References

https://supportportal.juniper.net/JSA82978
vendor-advisory

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • đź‘ľ

    Exploit known to exist

  • Vulnerability published

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