What is CVE-2023-36844?

CVE-2023-36844 is a medium-severity vulnerability in Juniper Networks Junos Os, classified under CWE-473. CVSS score: 5.3/10. Published 2023-08-17.

How severe is CVE-2023-36844?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2023-36844 known to be exploited?

Yes. CVE-2023-36844 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-11-13), indicating it is being actively exploited. 25 public proof-of-concept repositories are indexed.

Vulnerability in Juniper Networks Junos Os

CVE-2023-36844

A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to control certain, important environment variables. Using a crafted request an attack…

EPSS: 0.942 (99.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Juniper Networks Junos Os — versions 0, 21.1, 21.2

Weakness classification (CWE)

CWE-473

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2023-11-13. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2023-11-17.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Public proof-of-concept exploits

References

supportportal.juniper.net/JSA72300 (vendor-advisory, mitigation)
packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code…

Frequently asked questions

What is CVE-2023-36844?: CVE-2023-36844 is a medium-severity vulnerability in Juniper Networks Junos Os, classified under CWE-473. CVSS score: 5.3/10. Published 2023-08-17.
How severe is CVE-2023-36844?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2023-36844 known to be exploited?: Yes. CVE-2023-36844 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-11-13), indicating it is being actively exploited. 25 public proof-of-concept repositories are indexed.