CVE-2023-36847: Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerability
A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity.
With a specific request to installAppPackage.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 EX Series:
All versions prior to 20.4R3-S8; 21.1 versions 21.1R1 and later; 21.2 versions prior to 21.2R3-S6; 21.3 versions
prior to
21.3R3-S5; 21.4 versions
prior to
21.4R3-S4; 22.1 versions
prior to
22.1R3-S3; 22.2 versions
prior to
22.2R3-S1; 22.3 versions
prior to
22.3R2-S2, 22.3R3; 22.4 versions
prior to
22.4R2-S1, 22.4R3.
Other sources
Juniper Junos OS on EX 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 installAppPackage.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 Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 20.4R3-S8 - Upgrade
Upgrade
Juniper Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 21.2R3-S6 - Upgrade
Upgrade
Juniper Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 21.3R3-S5 - Upgrade
Upgrade
Juniper Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 21.4R3-S4 - Upgrade
Upgrade
Juniper Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 22.1R3-S3 - Upgrade
Upgrade
Juniper Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 22.2R3-S1 - Upgrade
Upgrade
Juniper Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 22.3R2-S2 - Upgrade
Upgrade
Juniper Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 22.3R3 - Upgrade
Upgrade
Juniper Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 22.4R2-S1 - Upgrade
Upgrade
Juniper Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 22.4R3 - Upgrade
Upgrade
Juniper Networks Junos OS on EX Seriesto a version that resolves this vulnerability.Fixed in 23.2R1 - Compensating control
Apply mitigations per vendor instructions for Juniper Networks Junos OS on EX Series Missing Authentication for Critical Function vulnerability; if mitigations are unavailable, discontinue use of the product.
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2023-36847?
CVE-2023-36847 is classified as a medium severity vulnerability due to its potential impact on file system integrity.
How do I fix CVE-2023-36847?
To fix CVE-2023-36847, upgrade to the latest version of Junos OS as specified in the vendor's advisory.
Which devices are affected by CVE-2023-36847?
CVE-2023-36847 affects Juniper Networks devices including the EX Series switches and SRX Series firewalls running specific versions of Junos OS.
Can CVE-2023-36847 be exploited remotely?
Yes, CVE-2023-36847 can be exploited by remote attackers without authentication.
What type of vulnerability is CVE-2023-36847?
CVE-2023-36847 is a Missing Authentication for Critical Function vulnerability.