CVE-2024-39535

Junos OS Evolved: ACX 7000 Series: When specific traffic is received in a VPLS scenario evo-pfemand crashes

Description

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS Evolved on ACX 7000 Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS). When a device has a Layer 3 or an IRB interface configured in a VPLS instance and specific traffic is received, the evo-pfemand processes crashes which causes a service outage for the respective FPC until the system is recovered manually. This issue only affects Junos OS Evolved 22.4R2-S1 and 22.4R2-S2 releases and is fixed in 22.4R3. No other releases are affected.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: 22.4R3-EVO, and all subsequent releases.

Workaround:

  • There are no known workarounds for this issue.

Category

7.1
CVSS
Severity: High
CVSS 4.0 •
CVSS 3.1 •
EPSS 0.06%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS Evolved
Published at:
Updated at:

References

Link Tags
https://supportportal.juniper.net/JSA82995 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2024-39535?
CVE-2024-39535 has been scored as a high severity vulnerability.
How to fix CVE-2024-39535?
To fix CVE-2024-39535: The following software releases have been updated to resolve this specific issue: 22.4R3-EVO, and all subsequent releases.
Is CVE-2024-39535 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-39535 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-39535?
CVE-2024-39535 affects Juniper Networks Junos OS Evolved.
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