Juniper Junos OS Privilege Escalation (JSA11237)

high Nessus Plugin ID 159271


The remote device is missing a vendor-supplied security patch.


The version of Junos OS installed on the remote host is affected by a vulnerability as referenced in the JSA11237 advisory. An Improper Input Validation vulnerability in J-Web of Juniper Networks Junos OS allows a locally authenticated J-Web attacker to escalate their privileges to root over the target device.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Apply the relevant Junos software release referenced in Juniper advisory JSA11237

See Also

Plugin Details

Severity: High

ID: 159271

File Name: juniper_jsa11237.nasl

Version: 1.5

Type: combined

Published: 3/29/2022

Updated: 4/26/2022

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 9

Temporal Score: 6.7

Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2021-31372


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:juniper:junos

Required KB Items: Host/Juniper/JUNOS/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 10/13/2021

Vulnerability Publication Date: 10/13/2021

Reference Information

CVE: CVE-2021-31372

JSA: JSA11237

IAVA: 2021-A-0478-S