Vulnerability in Juniper Acx7020
CVE-2024-39535
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (25.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Juniper Acx7020
- Juniper Acx7024
- Juniper Acx7024x
- Juniper Acx7100
- Juniper Acx7300
- Juniper Acx7509
- Juniper Junos OS Evolved — versions 22.4
- Juniper Networks Junos OS Evolved — versions 22.4R2-S1-EVO
Weakness classification (CWE)
Public proof-of-concept exploits
References
- supportportal.juniper.net/JSA82995 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2024-39535?
- CVE-2024-39535 is a medium-severity vulnerability in Juniper Acx7020, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 6.5/10. Published 2024-07-11.
- How severe is CVE-2024-39535?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2024-39535 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.