What is the CVSS score of CVE-2018-10933?

CVE-2018-10933 has a CVSS 3.0 base score of 9.1 (Critical). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 91.8%.

Is there a public PoC exploit available for CVE-2018-10933?

Yes, a public proof-of-concept exploit is available for CVE-2018-10933. Prioritise patching immediately. EPSS: 91.8%.

Is there a patch available for CVE-2018-10933?

Yes, a patch is available for CVE-2018-10933. Update the affected software to the latest version immediately.

Libssh CVE-2018-10933

CRITICAL

DEPRECATED: Authentication Bypass Issues (CWE-592)

2018-10-17 secalert@redhat.com

Authentication Bypass Debian Oracle Red Hat Canonical Debian Linux Enterprise Linux Libssh Oncommand Workflow Automation Ubuntu Linux Snapcenter Mysql Workbench Oncommand Unified Manager Storage Automation Store Netapp

9.1

CVSS 3.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-592
Impact	CVSS score of 9.1 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

Patch available 91.8% exploitation probability (EPSS)

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AnalysisAI

A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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 under CWE-592. A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. A malicious client could create channels without first performing authentication, resulting in unauthorized access. Affected products include: Libssh, Canonical Ubuntu Linux, Debian Debian Linux, Redhat Enterprise Linux, Netapp Oncommand Unified Manager.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.1 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

DescriptionNVD

A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. A malicious client could create channels without first performing authentication, resulting in unauthorized access.

Threat Intelligence Overview

EPSS Score

91.8%

Top 0% exploitable

Exploit

POC

Public exploit code exists

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS POC (1)

Exploit-DB

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 CRITICAL

CISA KEV No

Public POC Yes

EPSS 91.8%

Patch available Yes

Active threat Yes

Deciding rule

CRITICAL severity + public POC available

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

Poc

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

158

Low Medium High Critical

KEV: 0

EPSS: +92

CVSS: +46

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*

cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*

cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*

cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*

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

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

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

cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:windows:*:*

cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vsphere:*:*

cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*

cpe:2.3:a:netapp:snapcenter:-:*:*:*:*:*:*:*

cpe:2.3:a:netapp:storage_automation_store:-:*:*:*:*:*:*:*

cpe:2.3:a:oracle:mysql_workbench:*:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html ADVISORY https://www.libssh.org/security/advisories/CVE-2018-10933.txt REF http://www.securityfocus.com/bid/105677 REF https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10933 REF https://lists.debian.org/debian-lts-announce/2018/10/msg00010.html REF https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0016 REF https://security.netapp.com/advisory/ntap-20190118-0002/ REF https://usn.ubuntu.com/3795-1/ REF https://usn.ubuntu.com/3795-2/ REF https://www.debian.org/security/2018/dsa-4322

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