CVE-2017-2348 Juniper JUNOS Denial of Service (jdhcpd daemon crash) Vulnerability (JSA10800)

Juniper JUNOS is the network operating system used in Juniper Networks hardware systems.

The Juniper Enhanced jdhcpd daemon may experience high CPU utilization, or crash and restart upon receipt of an invalid IPv6 UDP packet. Both high CPU utilization and repeated crashes of the jdhcpd daemon can result in a denial of service as DHCP service is interrupted.

Affected Version:
Junos OS 14.1X53 prior to 14.1X53-D12, 14.1X53-D38, 14.1X53-D40 on QFX, EX, QFabric System; 15.1 prior to 15.1F2-S18, 15.1R4 on all products and platforms; 15.1X49 prior to 15.1X49-D80 on SRX; 15.1X53 prior to 15.1X53-D51, 15.1X53-D60 on NFX, QFX, EX.

On receipt of an invalid IPv6 UDP packet jdhcpd daemon may experience high CPU utilization, or crash and restart.

The following software releases have been updated to resolve this specific issue: 14.1X53-D12, 14.1X53-D38, 14.1X53-D40, 15.1F2-S18, 15.1R4, 15.1X49-D80, 15.1X53-D51, 15.1X53-D60, 16.1R1, and all subsequent releases. Workaround:
Devices that have the ability to transition from Juniper's Enhanced DHCP server, JDHCPD, to the Legacy DHCP server, DHCPD, can move back to Legacy.
Devices that do not support the ability to transition from Enhanced DHCP to Legacy DHCP do not have a workaround available unless customers decide to disable the DHCP services and forward DHCP client requests to other DHCP servers or discontinue the use of DHCP services.

Patch:
Following are links for downloading patches to fix the vulnerabilities:

JSA10800: junos