CVE-2018-0001: Junos: Unauthenticated Remote Code Execution through J-Web interface

Recommended actionWithin 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available

What, why and how

A remote, unauthenticated attacker may be able to execute code by exploiting a use-after-free defect found in older versions of PHP through injection of crafted data via specific PHP URLs within the context of the J-Web process. Affected releases are Juniper Networks Junos OS: 12.1X46 versions prior to 12.1X46-D67; 12.3 versions prior to 12.3R12-S5; 12.3X48 versions prior to 12.3X48-D35; 14.1 versions prior to 14.1R8-S5, 14.1R9; 14.1X53 versions prior to 14.1X53-D44, 14.1X53-D50; 14.2 versions prior to 14.2R7-S7, 14.2R8; 15.1 versions prior to 15.1R3; 15.1X49 versions prior to 15.1X49-D30; 15.1X53 versions prior to 15.1X53-D70.

What

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may execute code or commands in the affected security context.

What

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: a network path → Use After Free → execute code or commands in the affected security context
Attack surface: Network
Privileges required: None: unauthenticated exploitation is possible
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-416 ↗
CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Common Vulnerability Scoring System 3.0: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.

NetworkUnauthenticatedRemote code executionCWE-416

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2018-0826Official EUVD mapping

0 linked advisory records.

Official EUVD record ↗

Canadian Centre for Cyber Security · English · AV18-011Juniper Networks security bulletins

17.1R3 on MX series Junos OS versions 17.2X75 prior to 17.2X75-D50 CTPView versions 7.1, 7.2 and 7.3. Junos Space prior to 17.2R1 Security Director and Log Collector prior to 17.2R1 ScreenOS all versions without the latest security patch CVE Reference: CVE-2015-5174, CVE-2015-5188, CVE-2015-5220, CVE-2015-5304, CVE-2015-5600, CVE-2015-6563, CVE-2015-6564, CVE-2015-7236, CVE-2015-7501, CVE-2016-2141, CVE-2016-8655, CVE-2016-8743, CVE-2016-8858, CVE-2017-1000111, CVE-2017-1000112, CVE-2017-14106, CVE-2017-2634, CVE-2017-3167, CVE-2017-3169, CVE-2017-5645, CVE-2017-5664, CVE-2017-6074, CVE-2017-7668, CVE-2017-7679, CVE-2017-9788, CVE-2017-9798, CVE-2018-0001, CVE-2018-0002, CVE-2018-0003, CVE-2018-0004, CVE-2018-0005, CVE-2018-0006, CVE-2018-0007, CVE-2018-0008, CVE-2018-0009, CVE-2018-0010, CVE-2018-0011, CVE-2018-0012, CVE-2018-0013, CVE-2018-0014 Suggested action CCIRC recommends that system administrators test and deploy the vendor released updates on affected platforms accordingly. References https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10828&cat=SIRT_1&actp=LIST https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10829&cat=SIRT_1&actp=LIST https://kb.juniper.net/InfoCenter/index?page=content&id=JSA10830&cat=SIRT_1&actp=LIST https://kb.juniper.net/InfoCenter/index?page=

Official advisory ↗

CERT-FR · French · CERTFR-2018-AVI-026Multiples vulnérabilités dans les produits Juniper

.cve.org/CVERecord?id=CVE-2017-3167 Référence CVE CVE-2017-3169 https://www.cve.org/CVERecord?id=CVE-2017-3169 Référence CVE CVE-2017-5645 https://www.cve.org/CVERecord?id=CVE-2017-5645 Référence CVE CVE-2017-5664 https://www.cve.org/CVERecord?id=CVE-2017-5664 Référence CVE CVE-2017-6074 https://www.cve.org/CVERecord?id=CVE-2017-6074 Référence CVE CVE-2017-7668 https://www.cve.org/CVERecord?id=CVE-2017-7668 Référence CVE CVE-2017-7679 https://www.cve.org/CVERecord?id=CVE-2017-7679 Référence CVE CVE-2017-9788 https://www.cve.org/CVERecord?id=CVE-2017-9788 Référence CVE CVE-2017-9798 https://www.cve.org/CVERecord?id=CVE-2017-9798 Référence CVE CVE-2018-0001 https://www.cve.org/CVERecord?id=CVE-2018-0001 Référence CVE CVE-2018-0002 https://www.cve.org/CVERecord?id=CVE-2018-0002 Référence CVE CVE-2018-0003 https://www.cve.org/CVERecord?id=CVE-2018-0003 Référence CVE CVE-2018-0004 https://www.cve.org/CVERecord?id=CVE-2018-0004 Référence CVE CVE-2018-0005 https://www.cve.org/CVERecord?id=CVE-2018-0005 Référence CVE CVE-2018-0006 https://www.cve.org/CVERecord?id=CVE-2018-0006 Référence CVE CVE-2018-0007 https://www.cve.org/CVERecord?id=CVE-2018-0007 Référence CVE CVE-2018-0008 https://www.cve.org/CVERecord?id=CVE-2018-0008 Référence CVE CVE-2018-0009 https://www.cve.org/CVERecord?id=CVE-2018-0009 Ré

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2018-001734Juniper Networks Junos OS における解放済みメモリの使用に関する脆弱性

Juniper Networks Junos OS には、解放済みメモリの使用に関する脆弱性が存在します。

Official advisory ↗

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Patch available
Affected: Junos OS: 12.1X46 < 12.1X46-D67, 12.3 < 12.3R12-S5, 12.3X48 < 12.3X48-D35, 14.1 < 14.1R8-S5, 14.1R9, 14.1X53 < 14.1X53-D44, 14.1X53-D50, 14.2 < 14.2R7-S7, 14.2R8, 15.1 < 15.1R3, 15.1X49 < 15.1X49-D30, 15.1X53 < 15.1X53-D70
Fixed: The following software releases have been updated to resolve this specific issue: 12.1X46-D67, 12.3R12-S8*, 12.3X48-D55, 14.1R8-S5, 14.1R9, 14.1X53-D44, 14.1X53-D50, 14.2R7-S7, 14.2R8, 15.1F5-S8, 15.1F6-S8, 15.1R5-S6, 15.1R7, 15.1X49-D100, 15.1X53-D70, 16.1R4-S6, 16.1R5, 16.2R2-S2, 16.2R3, 17.1R2-S5*, 17.1R3*, 17.2R2, 17.3R1, and all subsequent releases.
*Pending release
NOTE: While Junos OS 12.3R12-S5, 12.3X48-D35, 15.1F2+, 15.1R3, 15.1X49-D30, and all subsequent releases are not vulnerable, this issue has been proactively resolved.
Action: Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround: No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.

Evidence and provenance

Published 10 Jan 2018 · Last source change 17 Sept 2024, 03:48 UTC · CWE-416 · Use After Free

CVE recordCVE.org · 5.1

CVSS sourceCNA

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-09-01

European sourceENISA EUVD · EUVD-2018-0826

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceNIST NVD

NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

1 Sep 2026, 02:42 UTC
ENISA EUVD mappingEUVD-2018-0826 was added to the official ENISA EUVD mapping for this CVE.
Before
not recorded
After
{"euvdId":"EUVD-2018-0826"}
ENISA EUVD ↗
17 Sep 2024, 03:48 UTC
Vendor guidanceAuthoritative vendor guidance changed: added patch: kb.juniper.net/JSA10828; added remediation: kb.juniper.net/JSA10828.
Before
no authoritative guidance recorded
After
patch: kb.juniper.net/JSA10828 · remediation: kb.juniper.net/JSA10828
kb.juniper.net ↗
17 Sep 2024, 03:48 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
12.1X46 < 12.1X46-D67; 12.3 < 12.3R12-S5; 12.3X48 < 12.3X48-D35; 14.1 < 14.1R8-S5, 14.1R9; 14.1X53 < 14.1X53-D44, 14.1X53-D50; 14.2 < 14.2R7-S7, 14.2R8; 15.1 < 15.1R3; 15.1X49 < 15.1X49-D30 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
After
12.1X46 < 12.1X46-D67; 12.3 < 12.3R12-S5; 12.3X48 < 12.3X48-D35; 14.1 < 14.1R8-S5, 14.1R9; 14.1X53 < 14.1X53-D44, 14.1X53-D50; 14.2 < 14.2R7-S7, 14.2R8; 15.1 < 15.1R3; 15.1X49 < 15.1X49-D30 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
CNA ↗
17 Sep 2024, 03:48 UTC
Remediation statusRemediation status changed from Awaiting fix to Patch available.
Before
Awaiting fix
After
Patch available
kb.juniper.net ↗
17 Sep 2024, 03:48 UTC
Catalogue recordCVE added to the BlackTree catalogue.
CNA ↗

2018-01-10CVE published

2024-09-17Fixed release or patch reference recorded

ENISA EUVD · EUVD-2018-0826↗Patch or update reference↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

Junos: Unauthenticated Remote Code Execution through J-Web interface

Published severity in operational context

Evidence used

Compensating controls

Verification

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

ENISA European Vulnerability Database

EUVD-2018-0826

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication