CVE-2023-36851: Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files
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
webauthoperation.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.
Other sources
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
webauthoperation.php
that doesn't require authentication, an attacker is able to upload arbitrary files via J-Web, leading to a loss of
integrity
for a certain part of the file system, which may allow chaining to other vulnerabilities.
This issue affects Juniper Networks Junos OS on SRX Series:
22.4 versions prior to 22,4R2-S2, 22.4R3; 23.2 versions prior to 23.2R2.
Juniper Junos OS on SRX Series contains a missing authentication for critical function vulnerability that allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to webauthoperation.php that doesn't require authentication, an attacker is able to upload arbitrary files via J-Web, leading to a loss of integrity for a certain part of the file system, which may allow chaining to other vulnerabilities.
— CISA
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Juniper Junos OS (SRX Series)to a version that resolves this vulnerability.Fixed in 21.2R3-S8 - Upgrade
Upgrade
Juniper Junos OS (SRX Series)to a version that resolves this vulnerability.Fixed in 21.4R3-S6 - Upgrade
Upgrade
Juniper Junos OS (SRX Series)to a version that resolves this vulnerability.Fixed in 22.1R3-S5 - Upgrade
Upgrade
Juniper Junos OS (SRX Series)to a version that resolves this vulnerability.Fixed in 22.2R3-S3 - Upgrade
Upgrade
Juniper Junos OS (SRX Series)to a version that resolves this vulnerability.Fixed in 22.3R3-S2 - Upgrade
Upgrade
Juniper Junos OS (SRX Series)to a version that resolves this vulnerability.Fixed in 22.4R2-S2 - Upgrade
Upgrade
Juniper Junos OS (SRX Series)to a version that resolves this vulnerability.Fixed in 22.4R3 - Upgrade
Upgrade
Juniper Junos OS (SRX Series)to a version that resolves this vulnerability.Fixed in 23.2R1-S2 - Upgrade
Upgrade
Juniper Junos OS (SRX Series)to a version that resolves this vulnerability.Fixed in 23.2R2 - Upgrade
Upgrade
Juniper Junos OS (SRX Series)to a version that resolves this vulnerability.Fixed in 23.4R1 - Compensating control
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable for the Junos OS (SRX Series) Missing Authentication for Critical Function vulnerability (J-Web/web authentication endpoint).
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2023-36851?
CVE-2023-36851 has a moderate severity rating, as it allows unauthorized access to critical functions with limited impact on the file system integrity.
How do I fix CVE-2023-36851?
To address CVE-2023-36851, apply the recommended patches provided by Juniper Networks for affected versions of Junos OS.
Which Junos OS versions are affected by CVE-2023-36851?
CVE-2023-36851 affects Junos OS versions 20.4 through 22.4 and specific releases within that range.
What products are impacted by CVE-2023-36851?
CVE-2023-36851 impacts Juniper SRX Series devices and Junos OS running on various supported platforms.
Can CVE-2023-36851 be exploited remotely?
Yes, CVE-2023-36851 can be exploited by an unauthenticated, remote attacker.