CVE-2023-28981
Assigner: juniper
Published: 2023-04-17T00:00:00
State: PUBLISHED
title: Junos OS and Junos OS Evolved: If malformed IPv6 router advertisements are received, memory corruption will occur which causes an rpd crash
datePublic: 2023-04-12T00:00:00
descriptions: value: An Improper Input Validation vulnerability in the kernel of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS). If the receipt of router advertisements is enabled on an interface and a specifically malformed RA packet is received, memory corruption will happen which leads to an rpd crash. This issue affects: Juniper Networks Junos OS 20.3 versions prior to 20.3R3-S5; 20.4 versions prior to 20.4R3-S3; 21.1 versions prior to 21.1R3-S4; 21.2 versions prior to 21.2R3; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R2; 22.1 versions prior to 22.1R2. Juniper Networks Junos OS Evolved 20.3-EVO version 20.3R1-EVO and later versions; 20.4-EVO versions prior to 20.4R3-S6-EVO; 21.3-EVO versions prior to 21.3R3-EVO; 21.4-EVO versions prior to 21.4R2-EVO; 22.1-EVO versions prior to 22.1R2-EVO.
affected: vendor: Juniper Networks
product: Junos OS
versions: version: 20.3
status: affected
lessThan: 20.3R3-S5
versionType: custom
version: 20.4
status: affected
lessThan: 20.4R3-S3, 20.4R3-S6
versionType: custom
version: 21.1
status: affected
lessThan: 21.1R3-S4
versionType: custom
version: 21.2
status: affected
lessThan: 21.2R3
versionType: custom
version: 21.3
status: affected
lessThan: 21.3R3
versionType: custom
version: 21.4
status: affected
lessThan: 21.4R2
versionType: custom
version: 22.1
status: affected
lessThan: 22.1R2
versionType: custom
vendor: Juniper Networks
product: Junos OS Evolved
versions: version: 20.3R1-EVO
status: affected
lessThan: 20.3-EVO*
versionType: custom
version: 20.4-EVO
status: affected
lessThan: 20.4R3-S6-EVO
versionType: custom
version: 21.3-EVO
status: affected
lessThan: 21.3R3-EVO
versionType: custom
version: 21.4-EVO
status: affected
lessThan: 21.4R2-EVO
versionType: custom
version: 22.1-EVO
status: affected
lessThan: 22.1R2-EVO
versionType: custom
metrics: cvssV3_1: version: 3.1
vectorString: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector: ADJACENT_NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
baseScore: 6.5
baseSeverity: MEDIUM
problemTypes: descriptions: type: CWE
description: CWE-20 Improper Input Validation
cweId: CWE-20
descriptions: type: text
description: Denial of Service (DoS)
x_generator: engine: Vulnogram 0.0.9
source: advisory: JSA70607
defect: 1645928
discovery: USER
configurations: value: To be affected by this vulnerability router advertisements need to be enabled on the interface:

  [protocols router-advertisement interface <interface-name>]
workarounds: value: If the receipt of router advertisements is not necessary (but just the solicited or unsolicited sending of RAs) then incoming RAs can be filtered and dropped by applying a firewall filter like the following:

set firewall family inet6 filter test term 1 from next-header icmp6
set firewall family inet6 filter test term 1 from icmp-type 134
set firewall family inet6 filter test term 1 then discard
set firewall family inet6 filter test term 2 then accept
exploits: value: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
solutions: value: The following software releases have been updated to resolve this specific issue:
Junos OS Evolved: 20.4R3-S6-EVO, 21.3R3-EVO, 21.4R2-EVO, 22.1R2-EVO, 22.2R1-EVO, and all subsequent releases.
Junos OS: 20.3R3-S5, 20.4R3-S3, 21.1R3-S4, 21.2R3, 21.3R3, 21.4R2, 22.1R2, 22.2R1, and all subsequent releases.