The Junos OS jdhcpd daemon provides advanced DHCP services to subscribers on all major hardware platforms, including MX/vMX Series, SRX Series, EX Series, QFX Series, and ACX Series. An issue was discovered that can cause jdhcpd to crash and restart when a crafted DHCPv6 packet is received from a subscriber. Repeated crashes of the jdhcpd process may constitute an extended denial of service condition for subscribers attempting to obtain IPv6 addresses. This issue only affects devices configured for DHCP services via IPv6 with either Server or Relay enabled. IPv4 is not vulnerable to this issue. Juniper SIRT is not aware of any malicious exploitation of this vulnerability. No other Juniper Networks products or platforms are affected by this issue. This issue has been assigned CVE-2017-2301 .
The following software releases have been updated to resolve this specific issue: Junos OS 11.4R13-S3, 12.1X46-D60, 12.3R12-S2, 12.3R13, 12.3X48-D40, 13.2X51-D40, 13.3R10, 14.1R8, 14.1X53-D12, 14.1X53-D35, 14.1X55-D35, 14.2R7, 15.1F6, 15.1R3, 15.1X49-D60, 15.1X53-D30, 16.1R1, and all subsequent releases. This issue is being tracked as PR 1137586 and is visible on the Customer Support website. KB16765 [juniper.net] - "In which releases are vulnerabilities fixed?" describes which release vulnerabilities are fixed as per our End of Engineering and End of Life support policies.
2017-01-11: Initial publication
No known workaround exists for this issue.