Main Vulnerability Database SB2023082953

SB2023082953 - Remote denial of service in Junos OS and Junos OS Evolved

Published: August 29, 2023 Updated: October 2, 2023

Security Bulletin ID SB2023082953

CSH Severity

Medium

Patch available

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 vulnerability.

1) Input validation error (CVE-ID: CVE-2023-4481)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

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 in the Routing Protocol Daemon (rpd). A remote attacker can send specially crafted BGP UPDATE messages over an established BGP session and perform a denial of service (DoS) attack.

This issue affects eBGP and iBGP, in both IPv4 and IPv6 implementations but requires a remote attacker to have at least one established BGP session.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

https://supportportal.juniper.net/s/article/2023-08-29-Out-of-Cycle-Security-Bulletin-Junos-OS-and-Junos-OS-Evolved-A-crafted-BGP-UPDATE-message-allows-a-remote-attacker-to-de-peer-reset-BGP-sessions-CVE-2023-4481