CVE-2023-36847
Exploitation confirmed. First attested on 2023-11-13 by CISA-ADP, CISA KEV, GCVE · kevintel.
- Published2023-08-17
- Fixed in20.4
- WeaknessCWE-306
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
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.
Timeline
dates in UTCObserved activity
isMalicious corpus · updated 2026-11-03 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-36847?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-36847?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 20.4 | < 20.4 | 20.4 | NVD |
| 20.4 | = 20.4 | no fix published | NVD |
| 21.1 | = 21.1 | no fix published | NVD |
| 21.2 | = 21.2 | no fix published | NVD |
| 21.3 | = 21.3 | no fix published | NVD |
| 21.4 | = 21.4 | no fix published | NVD |
| 22.1 | = 22.1 | no fix published | NVD |
| 22.2 | = 22.2 | no fix published | NVD |
| 22.3 | = 22.3 | no fix published | NVD |
| 22.4 | = 22.4 | no fix published | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Products declared by the CNA1 product
As juniper, the CNA that assigned this CVE, declared them in the CVE record; versions as written.
- Juniper Networks Junos OSother versions: not affected
platforms: EX Series
Affected- < 20.4R3-S8fixed in 20.4R3-S8semver
- ≥ 21.1, < 21.1*fixed in 21.1*semver
- ≥ 21.2, < 21.2R3-S6fixed in 21.2R3-S6semver
- ≥ 21.3, < 21.3R3-S5fixed in 21.3R3-S5semver
- ≥ 21.4, < 21.4R3-S4fixed in 21.4R3-S4semver
- ≥ 22.1, < 22.1R3-S3fixed in 22.1R3-S3semver
- ≥ 22.2, < 22.2R3-S1fixed in 22.2R3-S1semver
- ≥ 22.3, < 22.3R2-S2, 22.3R3fixed in 22.3R2-S2, 22.3R3semver
1 more version line in the CVE record.
Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2023-09-26
Fix
- Update Juniper junos to 20.4
- CISA’s required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.due 2023-11-17
Advisories and patches
- supportportal.juniper.netVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
- Metasploit modules
- none listed Metasploit Framework
CISA Known Exploited Vulnerability
- Date Added
- 2023-11-13
- Patch Due Date
- 2023-11-17
- Ransomware Use
- Unknown
- Required Action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Sources
- CISA KEVKEV entry2023-11-13
- ENISA EUVDexploitation2023-11-132023-11-13
- GCVEexploitation2023-11-13
- CISA-ADPSSVC decisionactive2023-11-15
- OpenCVESSVC decisionactive—
- CNACVSS 3.15.3known since 2026-10-23
- NVDCVSS 3.15.3read 2026-10-23
- CNAweakness (CWE)CWE-306known since 2026-10-23
- NVDweakness (CWE)CWE-306read 2026-10-23
- FIRST EPSSEPSS score83.5 %read 2026-11-02
- GitHub Advisoriesadvisory—
Identifiers
- EUVD-2023-40767same flawENISA EUVD · LicenseRef-ENISA-legal-notice
- GHSA-c38p-r7xc-grgpsame flawGitHub Advisory Database · CC-BY-4.0
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Published
- 2023-08-17
- Last Modified
- 2026-06-17
- NVD status
- Analyzed
- GitHub Advisory
- GHSA-c38p-r7xc-grgp
Frequently asked questions
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Related vulnerabilities
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Sources for this record
- CISA KEV · CC0-1.0 (cisagov/kev-data)
- CVE Program · CVE Program Terms of Use
- ENISA EU Vulnerability Database · ENISA legal notice §1.2 (reproduction authorised, provided the source is acknowledged)
- FIRST EPSS · EPSS terms of use (free use, attribution requested)
- GCVE · GCVE dump terms (preserve source attribution)
- GitHub Advisory Database · CC-BY-4.0 · GHSA-c38p-r7xc-grgp
- NVD · Public domain (17 U.S.C. § 105) for NVD-authored data; third-party content under its own terms
- OpenCVE · OpenCVE terms of service · terms restrict redistribution
- CISA Vulnrichment · CC0-1.0