CVE-2018-0026

Junos OS: Stateless IP firewall filter rules stop working as expected after reboot or upgrade

Description

After Junos OS device reboot or upgrade, the stateless firewall filter configuration may not take effect. This issue can be verified by running the command: user@re0> show interfaces <interface_name> extensive | match filters" CAM destination filters: 0, CAM source filters: 0 Note: when the issue occurs, it does not show the applied firewall filter. The correct output should show the applied firewall filter, for example: user@re0> show interfaces <interface_name> extensive | match filters" CAM destination filters: 0, CAM source filters: 0 Input Filters: FIREWAL_FILTER_NAME-<interface_name> This issue affects firewall filters for every address family. Affected releases are Juniper Networks Junos OS: 15.1R4, 15.1R5, 15.1R6 and SRs based on these MRs. 15.1X8 versions prior to 15.1X8.3.

Remediation

Solution:

  • The following software releases have been updated to resolve this specific issue: 15.1R7, 15.1X8.3 and all subsequent releases.

Workaround:

  • There are no known workarounds for this issue. However, once the issue has occurred, it can be restored by performing "commit full" (note: "commit full" is a potentially disruptive command).
4.7
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.11% Top 25%
Vendor Advisory juniper.net
Affected: Juniper Networks Junos OS
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/104720 third party advisory vdb entry
https://kb.juniper.net/JSA10859 vendor advisory
http://www.securitytracker.com/id/1041315 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2018-0026?
CVE-2018-0026 has been scored as a medium severity vulnerability.
How to fix CVE-2018-0026?
To fix CVE-2018-0026: The following software releases have been updated to resolve this specific issue: 15.1R7, 15.1X8.3 and all subsequent releases.
Is CVE-2018-0026 being actively exploited in the wild?
It is possible that CVE-2018-0026 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-0026?
CVE-2018-0026 affects Juniper Networks Junos OS.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.