CVE-2024-39535

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

Published Jul 11, 2024 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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

Vendor Solution

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


Vendor Workaround

There are no known workarounds for this issue.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-38061 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.
References
History
Type Values Removed Values Added
First Time appeared Juniper
Juniper acx7020
Juniper acx7024
Juniper acx7024x
Juniper acx7100
Juniper acx7300
Juniper acx7509
Juniper junos Os Evolved
CPEs cpe:2.3:h:juniper:acx7020:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7024:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7024x:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7100:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7300:-:*:*:*:*:*:*:*
cpe:2.3:h:juniper:acx7509:-:*:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:22.4:r2-s1:*:*:*:*:*:*
cpe:2.3:o:juniper:junos_os_evolved:22.4:r2-s2:*:*:*:*:*:*
Vendors & Products Juniper
Juniper acx7020
Juniper acx7024
Juniper acx7024x
Juniper acx7100
Juniper acx7300
Juniper acx7509
Juniper junos Os Evolved
Weaknesses

Sources

Status
PUBLISHED
Assigner
juniper
Published
Updated
Aug 2, 2024, 4:26 AM
Reserved
Jun 25, 2024, 3:12 PM
Status
Analyzed
Published
Jul 11, 2024, 5:15 PM
Modified
Jun 17, 2026, 7:42 AM