critical
9.8
CWE
754 284
Advisory Published
Updated

CVE-2019-0036: Junos OS: Firewall filter terms named "internal-1" and "internal-2" being ignored

First published: Wed Apr 10 2019(Updated: )

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.

Credit: sirt@juniper.net

Affected SoftwareAffected VersionHow to fix
Junos OS Evolved=15.1
Junos OS Evolved=15.1-f1
Junos OS Evolved=15.1-f2
Junos OS Evolved=15.1-f3
Junos OS Evolved=15.1-f4
Junos OS Evolved=15.1-f5
Junos OS Evolved=15.1-f6
Junos OS Evolved=15.1-r1
Junos OS Evolved=15.1-r2
Junos OS Evolved=15.1-r3
Junos OS Evolved=15.1-r4
Junos OS Evolved=15.1-r5
Junos OS Evolved=15.1-r6
Junos OS Evolved=15.1f6-s1-f6
Junos OS Evolved=15.1f6-s2-f6
Junos OS Evolved=15.1f6-s4-f6
Junos OS Evolved=15.1f6-s5-f6
Junos OS Evolved=15.1f6-s6-f6
Junos OS Evolved=15.1f6-s7-f6
Junos OS Evolved=15.1f6-s8-f6
Junos OS Evolved=15.1f6-s9-f6
Junos OS Evolved=15.1f6-s10-f6
Junos OS Evolved=15.1f6-s11-f6
Junos OS Evolved=15.1x49-d10
Junos OS Evolved=15.1x49-d100
Junos OS Evolved=15.1x49-d110
Junos OS Evolved=15.1x49-d120
Junos OS Evolved=15.1x49-d130
Junos OS Evolved=15.1x49-d150
Junos OS Evolved=15.1x49-d20
Junos OS Evolved=15.1x49-d30
Junos OS Evolved=15.1x49-d35
Junos OS Evolved=15.1x49-d40
Junos OS Evolved=15.1x49-d45
Junos OS Evolved=15.1x49-d50
Junos OS Evolved=15.1x49-d55
Junos OS Evolved=15.1x49-d60
Junos OS Evolved=15.1x49-d65
Junos OS Evolved=15.1x49-d70
Junos OS Evolved=15.1x49-d75
Junos OS Evolved=15.1x49-d80
Junos OS Evolved=15.1x49-d90
Junos OS Evolved=15.1x53-d10
Junos OS Evolved=15.1x53-d20
Junos OS Evolved=15.1x53-d21
Junos OS Evolved=15.1x53-d210
Junos OS Evolved=15.1x53-d230
Junos OS Evolved=15.1x53-d231
Junos OS Evolved=15.1x53-d232
Junos OS Evolved=15.1x53-d233
Junos OS Evolved=15.1x53-d25
Junos OS Evolved=15.1x53-d30
Junos OS Evolved=15.1x53-d32
Junos OS Evolved=15.1x53-d33
Junos OS Evolved=15.1x53-d34
Junos OS Evolved=15.1x53-d40
Junos OS Evolved=15.1x53-d45
Junos OS Evolved=15.1x53-d495
Junos OS Evolved=15.1x53-d56
Junos OS Evolved=15.1x53-d60
Junos OS Evolved=15.1x53-d61
Junos OS Evolved=15.1x53-d62
Junos OS Evolved=15.1x53-d63
Junos OS Evolved=16.1-r1
Junos OS Evolved=16.1-r2
Junos OS Evolved=16.1-r3
Junos OS Evolved=16.1-r4
Junos OS Evolved=16.1-r5
Junos OS Evolved=16.1-r6
Junos OS Evolved=16.1-r7
Junos OS Evolved=17.3-r1
Junos OS Evolved=17.3-r2
Junos OS Evolved=17.3-r3
Junos OS Evolved=17.3-r3-s1
Junos OS Evolved=17.3-r3-s2
Junos OS Evolved=17.3-r3-s3
Junos OS Evolved=17.2-r1
Junos OS Evolved=17.2-r1-s7
Junos OS Evolved=17.2-r2
Junos OS Evolved=17.2-r3
Junos OS Evolved=17.4-r1
Junos OS Evolved=17.4-r2
Junos OS Evolved=18.1-r1
Junos OS Evolved=18.1-r2
Junos OS Evolved=18.2-r1
Junos OS Evolved=18.2-r1-s3
Junos OS Evolved=18.2-r2-s1
Junos OS Evolved=18.2-r2-s2
Junos OS Evolved=18.3-r1-s1
Junos OS Evolved=18.2x75
Junos OS Evolved<=12.3
Junos OS Evolved=14.1x53
Junos OS Evolved=14.1x53-d10
Junos OS Evolved=14.1x53-d15
Junos OS Evolved=14.1x53-d16
Junos OS Evolved=14.1x53-d25
Junos OS Evolved=14.1x53-d26
Junos OS Evolved=14.1x53-d27
Junos OS Evolved=14.1x53-d30
Junos OS Evolved=14.1x53-d35
Junos OS Evolved=14.1x53-d40
Junos OS Evolved=14.1x53-d42
Junos OS Evolved=14.1x53-d43
Junos OS Evolved=14.1x53-d44
Junos OS Evolved=14.1x53-d45
Junos OS Evolved=14.1x53-d46
Junos OS Evolved=14.1x53-d47
Junos OS Evolved=14.1x53-d48
Junos OS Evolved=18.4-r1

Remedy

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.

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2019-0036?

    CVE-2019-0036 has a High severity rating as it involves silently ignoring critical firewall filter configurations.

  • How do I fix CVE-2019-0036?

    To fix CVE-2019-0036, upgrade your Junos OS to a version where this issue has been addressed as specified in the vendor's security advisories.

  • What versions of Junos OS are affected by CVE-2019-0036?

    CVE-2019-0036 affects multiple versions of Junos OS, including but not limited to 15.1 through 18.4.

  • Is there a workaround for CVE-2019-0036?

    Currently, there are no effective workarounds for CVE-2019-0036; updating to the latest version is recommended.

  • What impact does CVE-2019-0036 have on my network?

    CVE-2019-0036 may lead to unauthorized traffic being allowed through the network due to misconfigured firewall filters, posing a security risk.

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