CVE-2018-0014: Juniper Networks ScreenOS devices do not pad Ethernet packets with zeros, and thus some packets can contain fr

Routine

MEDIUM 4.3MITIGATE

CVE-2018-0014 is a medium-severity flaw (CVSS 4.3) affecting screenos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Juniper Networks ScreenOS devices do not pad Ethernet packets with zeros, and thus some packets can contain fragments of system memory or data from previous packets. This issue is often detected as CVE-2003-0001. The issue affects all versions of Juniper Networks ScreenOS prior to 6.3.0r25.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-200
Published	2018-01-10
Last modified	2026-06-17

Publisher (CNA): Juniper Networks, Inc. · Vendor: juniper

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-01-10 22:29 UTCPublished CVE record published
2026-06-17 01:29 UTCUpdated Record last modified

juniper screenos MITIGATE

Affected: 6.3.0r1 · 6.3.0r2 · 6.3.0r3 · 6.3.0r4 · 6.3.0r5 · 6.3.0r6 · 6.3.0r7 · 6.3.0r8

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.3.0r1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-0014?

screenos: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-0014 being exploited?

CVE-2018-0014 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-0014 affect?

CVE-2018-0014 affects screenos. Severity is medium (CVSS 4.3). Juniper Networks ScreenOS devices do not pad Ethernet packets with zeros, and thus some packets can contain fragments of system memory or data from previous packets. This issue is often detected as CVE-2003-0001. The issue affects all versi

How urgent is CVE-2018-0014?

Priority 27/100. No elevated risk signals yet.

Software pages

Juniper Junos vulnerabilities

Related CVEs

CVE-2017-2339 HIGH 8.4 MITIGATE A persistent cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firew
CVE-2017-2338 HIGH 8.4 MITIGATE A persistent cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firew
CVE-2017-2337 HIGH 8.4 MITIGATE A persistent cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firew
CVE-2017-2336 CRITICAL 9.6 MITIGATE A reflected cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firewa
CVE-2017-2335 HIGH 8.4 MITIGATE A persistent cross site scripting vulnerability in NetScreen WebUI of Juniper Networks Juniper NetScreen Firew

References

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