Skip to content
CVE Tracker
  • Newest CVEsPage
  • Recently added to KEVPage
  • Rising exploitation (EPSS)Page
  • Weekly digestPage
  • StatisticsPage
  • WatchlistPage
  • API documentationPage
  • MCP serverPage
  • Data sourcesPage
  • ChangelogPage
  • AboutPage
  • How it's builtPage
Back

CVE-2019-0036

Junos OS: Firewall filter terms named "internal-1" and "internal-2" being ignored

High7.2EPSS 0.97%
Published
Updated
Reserved
Assigned by
juniper

Description

When configuring a stateless firewall filter in Junos OS, terms named using the format "internal-n" (e.g. "internal-1", "internal-2", etc.) are silently ignored. No warning is issued during configuration, and the config is committed without error, but the filter criteria will match all packets leading to unexpected results. Affected releases are Juniper Networks Junos OS: All versions prior to and including 12.3; 14.1X53 versions prior to 14.1X53-D130, 14.1X53-D49; 15.1 versions prior to 15.1F6-S12, 15.1R7-S4; 15.1X49 versions prior to 15.1X49-D161, 15.1X49-D170; 15.1X53 versions prior to 15.1X53-D236, 15.1X53-D496, 15.1X53-D69; 16.1 versions prior to 16.1R7-S4, 16.1R7-S5; 16.2 versions prior to 16.2R2-S9; 17.1 versions prior to 17.1R3; 17.2 versions prior to 17.2R1-S8, 17.2R3-S1; 17.3 versions prior to 17.3R3-S4; 17.4 versions prior to 17.4R1-S7, 17.4R2-S3; 18.1 versions prior to 18.1R2-S4, 18.1R3-S4; 18.2 versions prior to 18.2R1-S5, 18.2R2-S1; 18.2X75 versions prior to 18.2X75-D40; 18.3 versions prior to 18.3R1-S3; 18.4 versions prior to 18.4R1-S1, 18.4R1-S2.

Scores

CVSS scores of CVE-2019-0036, by who scored it
Scored byCVSSScoreVector
juniperCNA (assigner)3.0High7.2CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
NVDNVD · Modified3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.97% · top 38% of all CVEs (5 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.2.

Weakness

Affected products

  • Juniper Networks · Junos OS

    • affected 12.1X46
    • affected 12.3X48
    • affected 12.3
    • affected 14.1X53 – < 14.1X53-D130, 14.1X53-D49
    • affected 15.1 – < 15.1F6-S12, 15.1R7-S4
    • affected 15.1X49 – < 15.1X49-D161, 15.1X49-D170
    • affected 15.1X53 – < 15.1X53-D236, 15.1X53-D496, 15.1X53-D69
    • affected 16.1 – < 16.1R7-S4, 16.1R7-S5
    • affected 16.2 – < 16.2R2-S9
    • affected 17.1 – < 17.1R3
    • affected 17.2 – < 17.2R1-S8, 17.2R3-S1
    • affected 17.3 – < 17.3R3-S4
    • affected 17.4 – < 17.4R1-S7, 17.4R2-S3
    • affected 18.1 – < 18.1R2-S4, 18.1R3-S4
    • affected 18.2 – < 18.2R1-S5, 18.2R2-S1
    • affected 18.2X75 – < 18.2X75-D40
    • affected 18.3 – < 18.3R1-S3
    • affected 18.4 – < 18.4R1-S1, 18.4R1-S2

What to do

Solution: The following software releases have been updated to resolve this specific issue: Junos OS 14.1X53-D130, 14.1X53-D49, 15.1F6-S12, 15.1R7-S4, 15.1X49-D161, 15.1X49-D170, 15.1X53-D236, 15.1X53-D496, 15.1X53-D69, 16.1R7-S4, 16.2R2-S9, 17.1R3, 17.2R1-S8, 17.2R3-S1, 17.3R3-S4, 17.4R1-S7, 17.4R2-S3, 18.1R2-S4, 18.1R3-S4, 18.2R1-S5, 18.2R2-S1, 18.2X75-D40, 18.3R1-S3, 18.4R1-S1, 19.1R1, and all subsequent releases. Note: Fixes are not available for Junos OS 12.1X46, 12.3X48, or 12.3R12 due to the high risk of making changes to earlier releases, and the easily implemented available workaround.

Workaround: Avoid configuring firewall filter names of the format: internal-n.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

CVE-2019-0036 badge
[![CVE-2019-0036](https://trackcve.app/badge/CVE-2019-0036.svg)](https://trackcve.app/cve/CVE-2019-0036)

Record last updated .