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Junos jdhcpd DoS Vulnerability

Information

Severity

Severity

High

Family

Family

JunOS Local Security Checks

CVSSv2 Base

CVSSv2 Base

7.8

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

7 years ago

Modified

Modified

5 years ago

Summary

Junos OS is prone to a denial of service vulnerability in jdhcpd due to crafted DHCPv6 packets.

Insight

Insight

The Junos OS jdhcpd daemon provides advanced DHCP services to subscribers on all major hardware platforms. 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.

Affected Software

Affected Software

Junos OS 11.4, 12.1, 12.3, 13.2, 13.3, 14.1, 14.2 and 15.1.

Detection Method

Detection Method

Checks if a vulnerable OS build is present on the target host.

Solution

Solution

New builds of Junos OS software are available from Juniper.

Common Vulnerabilities and Exposures (CVE)