title: Junos OS and Junos OS Evolved: The rpd will crash upon receiving a malformed BGP UPDATE message
description:
An Improper Validation of Syntactic Correctness of Input vulnerability in Routing Protocol Daemon (rpd) Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, network based attacker to cause a Denial of Service (DoS).
When a malformed BGP UPDATE packet is received over an established BGP session, the rpd crashes and restarts.
This issue affects both eBGP and iBGP implementations.
This issue affects:
Juniper Networks Junos OS
*  21.4 versions prior to 21.4R3-S4;
*  22.1 versions prior to 22.1R3-S3;
*  22.2 versions prior to 22.2R3-S2;
*  22.3 versions prior to 22.3R2-S2, 22.3R3;
*  22.4 versions prior to 22.4R2-S1, 22.4R3;
*  23.2 versions prior to 23.2R1, 23.2R2;
Juniper Networks Junos OS Evolved
*  21.4 versions prior to 21.4R3-S5-EVO;
*  22.1 versions prior to 22.1R3-S3-EVO;
*  22.2 versions prior to 22.2R3-S3-EVO;
*  22.3 versions prior to 22.3R2-S2-EVO;
*  22.4 versions prior to 22.4R3-EVO;
*  23.2 versions prior to 23.2R2-EVO;
problem types: CWE-1286: Improper Validation of Syntactic Correctness of Input
affected:
{
defaultStatus: unaffected
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 21.4R3-S4, status: affected, version: 21.4, versionType: semver
lessThan: 22.1R3-S3, status: affected, version: 22.1, versionType: semver
lessThan: 22.2R3-S2, status: affected, version: 22.2, versionType: semver
lessThan: 22.3R2-S2, 22.3R3, status: affected, version: 22.3, versionType: semver
lessThan: 22.4R2-S1, 22.4R3, status: affected, version: 22.4, versionType: semver
lessThan: 23.2R1, 23.2R2, status: affected, version: 23.2, versionType: semver
}
{
defaultStatus: unaffected
product: Junos OS Evolved
vendor: Juniper Networks
versions:
lessThan: 21.4R3-S5-EVO, status: affected, version: 21.4-EVO, versionType: semver
lessThan: 22.1R3-S3-EVO, status: affected, version: 22.1-EVO, versionType: semver
lessThan: 22.2R3-S3-EVO, status: affected, version: 22.2-EVO, versionType: semver
lessThan: 22.3R2-S2-EVO, status: affected, version: 22.3-EVO, versionType: semver
lessThan: 22.4R3-EVO, status: affected, version: 22.4-EVO, versionType: semver
lessThan: 23.2R2-EVO, status: affected, version: 23.2-EVO, versionType: semver
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: ADJACENT_NETWORK
availabilityImpact: HIGH
baseScore: 6.5
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL
exploits: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: The following software releases have been updated to resolve this specific issue:
Junos OS: 21.4R3-S4, 22.1R3-S3, 22.2R3-S2, 22.3R2-S2, 22.3R3, 22.4R2-S1, 22.4R3, 23.1R2, 23.2R1, 23.2R2, 23.3R1 and all subsequent releases.
Junos OS Evolved: 22.1R3-S3-EVO, 22.3R2-S2-EVO, 22.4R3-EVO, 23.1R2-EVO, 23.2R2-EVO, 23.3R1-EVO and all subsequent releases.
workarounds: There are no known workarounds for this issue.