Actively exploited · Published Sep 26, 2023 · Assigned by juniper
CVE-2023-36851Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files
Medium 5.3 Exploited
In plain English
A medium-severity missing authentication in Junos OS from Juniper Networks. Attackers are actively exploiting it in the wild (listed by CISA on November 13, 2023). The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities). Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA guidance
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Nov 17, 2023.
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Juniper Networks | Junos OS | 21.2 – before 21.2R3-S821.4 – before 21.4R3-S622.1 – before 22.1R3-S522.2 – before 22.2R3-S322.3 – before 22.3R3-S222.4 – before 22.4R2-S2, 22.4R323.2 – before 23.2R1-S2, 23.2R2 |
Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://supportportal.juniper.net/JSA72300 vendor-advisory, mitigation
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36851 government-resource