SB2021041508 - Denial of service in Juniper Junos OS FXPC
Published: April 15, 2021
Security Bulletin ID
SB2021041508
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2021-0237)
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 processing specific layer 2 frames on Juniper Networks EX4300-MP Series, EX4600 Series, EX4650 Series, QFX5K Series deployed as a Virtual Chassis with a specific Layer 2 circuit configuration. A remote attacker can send specially crafted traffic to the system and crash the Packet Forwarding Engine manager (FXPC).
Remediation
Install update from vendor's website.