title: Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files
description: A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity.
With a specific request to
webauth_operation.php
that doesn't require authentication, an attacker is able to upload and download arbitrary files via J-Web, leading to a loss of
integrity or confidentiality, which may allow chaining to other vulnerabilities.
This issue affects Juniper Networks Junos OS on SRX Series:
*
21.2 versions prior to 21.2R3-S8;
*  21.4
versions prior to
21.4R3-S6;
*  22.1
versions prior to
22.1R3-S5;
*  22.2
versions prior to
22.2R3-S3;
*  22.3
versions prior to
22.3R3-S2;
*  22.4 versions prior to 22,4R2-S2, 22.4R3;
*  23.2 versions prior to
23.2R1-S2, 23.2R2.
problem types: CWE-306 Missing Authentication for Critical Function
affected:
{
defaultStatus: unaffected
platforms: SRX Series
product: Junos OS
vendor: Juniper Networks
versions:
lessThan: 21.2R3-S8, status: affected, version: 21.2, versionType: semver
lessThan: 21.4R3-S6, status: affected, version: 21.4, versionType: semver
lessThan: 22.1R3-S5, status: affected, version: 22.1, versionType: semver
lessThan: 22.2R3-S3, status: affected, version: 22.2, versionType: semver
lessThan: 22.3R3-S2, status: affected, version: 22.3, versionType: semver
lessThan: 22.4R2-S2, 22.4R3, status: affected, version: 22.4, versionType: semver
lessThan: 23.2R1-S2, 23.2R2, status: affected, version: 23.2, versionType: semver
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 5.3
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: LOW
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
version: 3.1
]
format: CVSS
scenarios: GENERAL
exploits:
While Juniper SIRT is not aware of a successful exploit against a customer, a proof of concept has been published and exploit attempts have been detected.
solutions: The following software releases have been updated to resolve this specific issue: 21.2R3-S8*, 21.4R3-S6*, 22.1R3-S5*, 22.2R3-S3*, 22.3R3-S2*, 22.4R2-S2, 22.4R3*, 23.2R1-S2, 23.2R2*, 23.4R1, and all subsequent releases.
*Pending Publication
workarounds:
Disable J-Web, or limit access to only trusted hosts.