CVE-2023-36847

criticalknown exploitedpublic exploitcovered by 1 sourcefirst seen 2023-11-13

Actively exploited. CVE-2023-36847 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-11-13) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

Public exploit code is available. Proof-of-concept or working exploit code for CVE-2023-36847 is indexed in Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.

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.

CSIRTS triage

What: The vulnerability allows an unauthenticated attacker to upload arbitrary files via J-Web, impacting file system integrity.
Who is affected: Deployments of Juniper Junos OS on EX Series.
Urgency: Remediation is urgent due to active exploitation and critical severity.
Action: Apply the latest security patch provided by Juniper.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all EPSS-scored CVEs.

Exploit availability

Public exploit or proof-of-concept code for CVE-2023-36847 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.

NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗

Advisory coverage (1)

criticalexploitedCVE-2023-36847: Juniper Junos OS EX Series Missing Authentication for Critical Function Vulnerabilitycisa-kev · 2023-11-13

External references

NVD record for CVE-2023-36847

CVE.org record

CISA KEV catalog

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