# CVE-2023-36846

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 user.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: * 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-S5; * 22.1 versions prior to 22.1R3-S3; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R2-S2, 22.3R3; * 22.4 versions prior to 22.4R2-S1, 22.4R3.

- Page: https://www.vulneraibility.com/cve/CVE-2023-36846
- CVSS: 5.3
- Known exploited: yes, in CISA KEV since 2023-11-13; CISA due date 2023-11-17
- EPSS: 93.47% (percentile 99.8)
- Unvetted proof-of-concept code on GitHub: 1 GitHub proof of concept (first 2023-08-29)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2023-11-15)
- Weakness: CWE-306
- Published: 2023-08-17

## Affected versions

- Juniper Networks Junos OS: affected < 20.4R3-S8; >= 21.1 and < 21.1*; >= 21.2 and < 21.2R3-S6; >= 21.3 and < 21.3R3-S5; >= 21.4 and < 21.4R3-S5; >= 22.1 and < 22.1R3-S3; >= 22.2 and < 22.2R3-S2; >= 22.3 and < 22.3R2-S2, 22.3R3; >= 22.4 and < 22.4R2-S1, 22.4R3

A version outside these ranges is not a statement that it is unaffected.

## References

- [advisory] https://supportportal.juniper.net/JSA72300
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36846

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.