Input validation error in Junos OS - CVE-2019-0067
Published: October 14, 2019
Vulnerability identifier: #VU21755
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-2019-0067
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 receipt of a specific link-local IPv6 packet destined to the RE. A remote attacker on adjacent network can send a specially crafted IPv6 packet, repeatedly crash the system and restart (vmcore) and cause a prolonged denial of service condition on the target system.
Note: This issue affects Junos OS devices with Multi-Chassis Link Aggregation Group (MC-LAG) enabled.
Affected software
Junos OS
How to mitigate CVE-2019-0067
Install updates from vendor's website.
Junos OS - addressed in versions 16.1R6-S2, 16.1R7, 16.2R2-S10, 17.1R3, 17.2R1