2018-07 Security Bulletin: Junos OS: A malicious crafted IPv6 DHCP packet may cause the JDHCPD daemon to core (CVE-2018-0034)

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Product Affected:
This issue affects Junos OS 12.3, 12.3X48, 14.1X53, 15.1, 15.1X49, 15.1X53, 16.1, 16.2, 17.1, 17.2, 17.3, 17.4.
Problem:

A Denial of Service vulnerability exists in the Juniper Networks Junos OS JDHCPD daemon which allows an attacker to core the JDHCPD daemon by sending a crafted IPv6 packet to the system.
This issue is limited to systems which receives IPv6 DHCP packets on a system configured for DHCP processing using the JDHCPD daemon.
This issue does not affect IPv4 DHCP packet processing.

Affected releases are Juniper Networks Junos OS:
12.3 versions prior to 12.3R12-S10 on EX Series;
12.3X48 versions prior to 12.3X48-D70 on SRX Series;
14.1X53 versions prior to 14.1X53-D47 on EX2200/VC, EX3200, EX3300/VC, EX4200, EX4300, EX4550/VC, EX4600, EX6200, EX8200/VC (XRE), QFX3500, QFX3600, QFX5100;
14.1X53 versions prior to 14.1X53-D130 on QFabric;
15.1 versions prior to 15.1R4-S9, 15.1R6-S6, 15.1R7;
15.1X49 versions prior to 15.1X49-D140 on SRX Series;
15.1X53 versions prior to 15.1X53-D67 on QFX10000 Series;
15.1X53 versions prior to 15.1X53-D233 on QFX5110, QFX5200;
15.1X53 versions prior to 15.1X53-D471 on NFX 150, NFX 250;
16.1 versions prior to 16.1R3-S9, 16.1R4-S8, 16.1R5-S4, 16.1R6-S3, 16.1R7;
16.2 versions prior to 16.2R2-S5, 16.2R3;
17.1 versions prior to 17.1R1-S7, 17.1R2-S7, 17.1R3;
17.2 versions prior to 17.2R1-S6, 17.2R2-S4, 17.2R3;
17.3 versions prior to 17.3R1-S4, 17.3R2-S2, 17.3R3;
17.4 versions prior to 17.4R1-S3, 17.4R2.

For applicable CLI configuration assistance on your device please refer to the KB and Feature Explorer in the URL section further in this advisory.

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-2018-0034.

 

Solution:
The following software releases have been updated to resolve this specific issue: Junos OS 12.3R12-S10, 12.3X48-D70, 14.1X53-D130*, 14.1X53-D47, 15.1R4-S9, 15.1R6-S6, 15.1R7, 15.1X49-D140, 15.1X53-D233, 15.1X53-D471, 15.1X53-D67, 16.1R3-S9, 16.1R4-S8, 16.1R5-S4, 16.1R6-S3, 16.1R7, 16.2R2-S5, 16.2R3, 17.1R1-S7, 17.1R2-S7, 17.1R3, 17.2R1-S6, 17.2R2-S4, 17.2R3, 17.3R1-S4, 17.3R2-S2, 17.3R3, 17.4R1-S3, 17.4R2, 18.1R1, and all subsequent releases.
*Pending Publication

This issue is being tracked as PR 1334230 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 viable workarounds for this issue.
Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
Modification History:
2018-07-11: Initial Publication.
Related Links:
CVSS Score:
5.3 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
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."