What is the CVSS score of CVE-2019-3880?

CVE-2019-3880 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L. EPSS exploitation probability: 3.4%.

Is there a patch available for CVE-2019-3880?

Yes, a patch is available for CVE-2019-3880. Update the affected software to the latest version immediately.

Samba CVE-2019-3880

MEDIUM

Path Traversal (CWE-22)

2019-04-09 secalert@redhat.com

Path Traversal Microsoft Debian Red Hat Debian Linux Enterprise Linux Fedora Leap Samba Opensuse Gluster Storage Fedoraproject

5.4

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-22 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V5 - File Handling Path canonicalization, traversal prevention MITRE ATT&CK 2 techniques across 2 tactics: Discovery, Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 5.4 (MEDIUM). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required.
Exploit ScenarioDerived	A remote attacker could access files and directories outside the intended path by sending crafted requests to the affected application.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 3.4% exploitation probability (EPSS)

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AnalysisAI

A flaw was found in the way samba implemented an RPC endpoint emulating the Windows registry service API. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, low attack complexity. This Path Traversal vulnerability could allow attackers to access files and directories outside the intended path.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Validate and canonicalize file paths. Use chroot or sandboxing. Reject input containing path separators or '../' sequences.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Path Traversal (CWE-22), which allows attackers to access files and directories outside the intended path. A flaw was found in the way samba implemented an RPC endpoint emulating the Windows registry service API. An unprivileged attacker could use this flaw to create a new registry hive file anywhere they have unix permissions which could lead to creation of a new file in the Samba share. Versions before 4.8.11, 4.9.6 and 4.10.2 are vulnerable. Affected products include: Samba, Debian Debian Linux, Redhat Gluster Storage, Redhat Enterprise Linux, Fedoraproject Fedora. Version information: before 4.8.11.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.4 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

DescriptionNVD

A flaw was found in the way samba implemented an RPC endpoint emulating the Windows registry service API. An unprivileged attacker could use this flaw to create a new registry hive file anywhere they have unix permissions which could lead to creation of a new file in the Samba share. Versions before 4.8.11, 4.9.6 and 4.10.2 are vulnerable.

Threat Intelligence Overview

EPSS Score

3.4%

Top 13% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 3.4%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +3

CVSS: +27

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Path Traversal HIGH

Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.

Affected Products (CPE)NVD

cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*

cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

cpe:2.3:a:redhat:gluster_storage:3.0:*:*:*:*:*:*:*

cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:28:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*

cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00050.html PATCH https://www.samba.org/samba/security/CVE-2019-3880.html REF http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00106.html REF https://access.redhat.com/errata/RHSA-2019:1966 REF https://access.redhat.com/errata/RHSA-2019:1967 REF https://access.redhat.com/errata/RHSA-2019:2099 REF https://access.redhat.com/errata/RHSA-2019:3582 REF https://access.redhat.com/security/cve/cve-2019-3880 REF https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3880 REF https://lists.debian.org/debian-lts-announce/2019/04/msg00013.html REF https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6354GALK73CZWQKFUG7AWB6EIEGFMF62/ REF https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HSRLRO7BPRFETVFZ4TVJL2VFZEPHKJY4/ REF https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JTJVFA3RZ6G2IZDTVKLHRMX6QBYA4GPA/ REF https://security.netapp.com/advisory/ntap-20190411-0004/ REF https://support.f5.com/csp/article/K20804356 REF https://www.synology.com/security/advisory/Synology_SA_19_15

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