CVE-2021-31354
Assigner: juniper
Published: 2021-10-13T00:00:00
State: PUBLISHED
affected: product: Junos OS
vendor: Juniper Networks
versions: lessThan: 19.2R1
status: unaffected
version: unspecified
versionType: custom
lessThan: 19.2R3-S3
status: affected
version: 19.2
versionType: custom
lessThan: 19.3R3-S3
status: affected
version: 19.3
versionType: custom
lessThan: 20.1R2-S2, 20.1R3-S1
status: affected
version: 20.1
versionType: custom
lessThan: 20.2R3-S2
status: affected
version: 20.2
versionType: custom
lessThan: 20.3R3
status: affected
version: 20.3
versionType: custom
lessThan: 20.4R3
status: affected
version: 20.4
versionType: custom
lessThan: 21.1R2
status: affected
version: 21.1
versionType: custom
product: Junos OS Evolved
vendor: Juniper Networks
versions: lessThan: unspecified
status: affected
version: 20.1R1-EVO
versionType: custom
lessThan: 21.2R2-EVO
status: affected
version: unspecified
versionType: custom
configurations: value: Systems vulnerable to this issue will have the Junos License Client set to Network Mode as follows:

  [system license network-mode]

credits: value: Juniper SIRT would like to acknowledge and thank The UK's National Cyber Security Centre (NCSC) for responsibly reporting this vulnerability.
datePublic: 2021-10-13T00:00:00
descriptions: value: An Out Of Bounds (OOB) access vulnerability in the handling of responses by a Juniper Agile License (JAL) Client in Juniper Networks Junos OS and Junos OS Evolved, configured in Network Mode (to use Juniper Agile License Manager) may allow an attacker to cause a partial Denial of Service (DoS), or lead to remote code execution (RCE). The vulnerability exists in the packet parsing logic on the client that processes the response from the server using a custom protocol. An attacker with control of a JAL License Manager, or with access to the local broadcast domain, may be able to spoof a new JAL License Manager and/or craft a response to the Junos OS License Client, leading to exploitation of this vulnerability. This issue only affects Junos systems configured in Network Mode. Systems that are configured in Standalone Mode (the default mode of operation for all systems) are not vulnerable to this issue. This issue affects: Juniper Networks Junos OS: 19.2 versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos OS Evolved: version 20.1R1-EVO and later versions, prior to 21.2R2-EVO. This issue does not affect Juniper Networks Junos OS versions prior to 19.2R1.
exploits: value: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
metrics: cvssV3_1: attackComplexity: HIGH
attackVector: ADJACENT_NETWORK
availabilityImpact: LOW
baseScore: 7.1
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
version: 3.1
problemTypes: descriptions: cweId: CWE-125
description: CWE-125 Out-of-bounds Read
type: CWE
descriptions: description: Denial of Service (DoS)
type: text
solutions: value: The following software releases have been updated to resolve this specific issue:

Junos OS 19.3R3-S3, 20.1R2-S2, 20.1R3-S1, 20.2R3-S2, 20.3R3, 20.4R3, 21.1R2, 21.2R1, and all subsequent releases.
Junos OS Evolved 21.2R2-EVO, 21.3R1-EVO, and all subsequent releases.

source: advisory: JSA11219
defect: 1582419
discovery: EXTERNAL
title: Junos OS and Junos OS Evolved: A vulnerability in the Juniper Agile License Client may allow an attacker to perform Remote Code Execution (RCE)
workarounds: value: Disable Network Mode and configure the Junos License Client to use Standalone Mode:

  user@junos# set system license standalone-mode

x_generator: engine: Vulnogram 0.0.9