Input validation error in Junos OS - CVE-2019-0063
Published: October 14, 2019
Vulnerability identifier: #VU21759
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-0063
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when an MX Series Broadband Remote Access Server (BRAS) is configured as a Broadband Network Gateway (BNG) with DHCPv6 enabled. A remote attacker can send a specially crafted DHCP response message on a subscriber interface, crash jdhcpd and cause an extended denial of service condition on the target system.
Affected software
Junos OS
How to mitigate CVE-2019-0063
Install updates from vendor's website.
Junos OS - addressed in versions 15.1R7-S5, 16.1R7-S5, 16.2R2-S10, 17.1R3-S1, 17.2R3-S2, 17.3R3-S6, 17.4R2-S5, 17.4R3, 18.1R3-S6, 18.2X75-D50, 18.2R2-S4, 18.2R3, 18.3R1-S5, 18.3R3, 18.4R2, 19.1R1-S2, 19.1R2, 19.2R1