SB2021071917 - Denial of service in Junos OS when handling BGP UPDATE message

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Main Vulnerability Database SB2021071917

SB2021071917 - Denial of service in Junos OS when handling BGP UPDATE message

Published: July 19, 2021

Security Bulletin ID SB2021071917
Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Input validation error (CVE-ID: CVE-2021-0282)

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 a specific BGP UPDATE on Juniper Networks Junos OS devices with Multipath or add-path feature enabled. A remote attacker can send specific BGP UPDATE message and crash the routing process daemon (RPD).

This BGP UPDATE message can propagate to other BGP peers with vulnerable Junos versions on which Multipath or add-path feature is enabled, and cause RPD to crash and restart. This issue affects both IBGP and EBGP deployments in IPv4 or IPv6 network.



Remediation

Install update from vendor's website.

References