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2019-01 Security Bulletin: Junos OS: EX and QFX series: Stateless firewall filter ignores IPv6 next-header configuration (CVE-2019-0005)



Article ID: JSA10905 SECURITY_ADVISORIES Last Updated: 13 Feb 2019Version: 3.0
Product Affected:
This issue affects Junos OS 14.1X53, 15.1, 15.1X53, 16.1, 17.1, 17.2, 17.3, 17.4, 18.1. Affected platforms: EX2300/EX3400, EX2300/EX3400 series, EX4600, QFX3K series, QFX5200/QFX5110 series, QFX5k series.

On EX2300, EX3400, EX4600, QFX3K and QFX5K series, firewall filter configuration cannot perform packet matching on any IPv6 next-header.

This issue may allow IPv6 packets that should have been blocked to be forwarded.

IPv4 packet filtering is unaffected by this vulnerability.

Affected releases are Juniper Networks Junos OS on EX and QFX series;:
  • 14.1X53 versions prior to 14.1X53-D47;
  • 15.1 versions prior to 15.1R7;
  • 15.1X53 versions prior to 15.1X53-D234 on QFX5200/QFX5110 series;
  • 15.1X53 versions prior to 15.1X53-D591 on EX2300/EX3400 series;
  • 16.1 versions prior to 16.1R7;
  • 17.1 versions prior to 17.1R2-S10, 17.1R3;
  • 17.2 versions prior to 17.2R3;
  • 17.3 versions prior to 17.3R3;
  • 17.4 versions prior to 17.4R2;
  • 18.1 versions prior to 18.1R2.

This issue occurs when the following IPv6 firewall filter is configured:
[firewall family inet6 filter <filter-name> term <term-name> from next-header <header-type> ]
[firewall family inet6 filter <filter-name> term <term-name> from next-header-except <header-type> ]

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

This issue was seen during production usage.

This issue has been assigned CVE-2019-0005.

The following software releases have been updated to resolve this specific issue: Junos OS 14.1X53-D47, 15.1R7, 15.1X53-D234, 15.1X53-D591, 16.1R7, 17.1R2-S10, 17.1R3, 17.2R3, 17.3R3, 17.4R2, 18.1R2, 18.2R1, 18.2X75-D5, and all subsequent releases.

This issue is being tracked as PR 1346052 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).


There are no known workarounds for this issue.

Software Releases, patches and updates are available at
Modification History:
  • 2019-01-09: Initial Publication.
  • 2019-01-10: Minor edit, adding 17.1R2-S10 in the Solution section (it was already in the Problem description section)
  • 2019-02-13: EX & QFX do not support extension-headers configuration, updating the JSA to be more specific it affects only IPv6 next-header configuration.
CVSS Score:
5.8 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)
Severity Level:
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."

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