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

  [JSA10905] Show Article Properties


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.
Problem:

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

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 extension-headers <header-type> ]
[firewall family inet6 filter <filter-name> term <term-name> from extension-headers-except <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.
Solution:

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).

Workaround:

There are no known workarounds for this issue.

Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
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)
Related Links:
CVSS Score:
5.8 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)
Risk Level:
Medium
Risk Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."