What is the CVSS score of CVE-2018-3639?

CVE-2018-3639 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 46.0%.

Is there a public PoC exploit available for CVE-2018-3639?

Yes, a public proof-of-concept exploit is available for CVE-2018-3639. Prioritise patching immediately. EPSS: 46.0%.

Is there a patch available for CVE-2018-3639?

Yes, a patch is available for CVE-2018-3639. Update the affected software to the latest version immediately.

Debian Linux CVE-2018-3639

MEDIUM

Observable Discrepancy (CWE-203)

2018-05-22 secure@intel.com

Authentication Bypass Microsoft Debian Oracle Red Hat Siemens Canonical Intel Debian Linux Enterprise Linux Desktop Enterprise Linux Eus Enterprise Linux Server Enterprise Linux Server Aus Enterprise Linux Server Tus Enterprise Linux Workstation Solaris Ubuntu Linux Windows Server 2008 Windows Server 2012 Windows Server 2016 Nvidia Sonicwall Micollab Openstack Email Security Windows 10 Windows 7 Windows 8 1 Pentium Simatic S7 1500 Firmware Virtualization Virtualization Manager Simatic Itp1000 Firmware Simatic Ipc847D Firmware Simatic Ipc847C Firmware Simatic Ipc827D Firmware Simatic Ipc827C Firmware Simatic Ipc677D Firmware Simatic Ipc677C Firmware Simatic Ipc647D Firmware Simatic Ipc647C Firmware Simatic Ipc627D Firmware Simatic Ipc627C Firmware Simatic Ipc547G Firmware Simatic Ipc547E Firmware Simatic Ipc477E Firmware Simatic Ipc477D Firmware Simatic Field Pg M4 Firmware Simatic Field Pg M5 Firmware Simatic Ipc427D Firmware Simatic Ipc427E Firmware Schneider Electric Mrg Realtime Web Application Firewall Global Management System Xeon E3 1240 V5 Struxureware Data Center Expert Jetson Tx1 Atom C Atom E Atom X5 E3930 Atom X5 E3940 Atom X7 E3950 Atom Z Celeron J Celeron N Core I3 Core I5 Core I7 Core M Pentium J Xeon E 1105C Xeon E3 Xeon E3 1105C V2 Xeon E3 1125C V2 Xeon E3 1220 V2 Xeon E3 1220 V3 Xeon E3 1220 V5 Xeon E3 1220 V6 Xeon E3 12201 Xeon E3 12201 V2 Xeon E3 1220L V3 Xeon E3 1225 Xeon E3 1225 V2 Xeon E3 1225 V3 Xeon E3 1225 V5 Xeon E3 1225 V6 Xeon E3 1226 V3 Xeon E3 1230 Xeon E3 1230 V2 Xeon E3 1230 V3 Xeon E3 1230 V5 Xeon E3 1230 V6 Xeon E3 1230L V3 Xeon E3 1231 V3 Xeon E3 1235 Xeon E3 1235L V5 Xeon E3 1240 Xeon E3 1240 V2 Xeon E3 1240 V3 Xeon E3 1240 V6 Xeon E3 1240L V3 Xeon E3 1240L V5 Xeon E3 1241 V3 Xeon E3 1245 Xeon E3 1245 V2 Xeon E3 1245 V3 Xeon E3 1245 V5 Xeon E3 1245 V6 Xeon E3 1246 V3 Xeon E3 1258L V4 Xeon E3 1260L Xeon E3 1260L V5 Xeon E3 1265L V2 Xeon E3 1265L V3 Xeon E3 1265L V4 Xeon E3 1268L V3 Xeon E3 1268L V5 Xeon E3 1270 Xeon E3 1270 V2 Xeon E3 1270 V3 Xeon E3 1270 V5 Xeon E3 1270 V6 Xeon E3 1271 V3 Xeon E3 1275 V2 Xeon E3 1275 V3 Xeon E3 1275 V5 Xeon E3 1275 V6 Xeon E3 1275L V3 Xeon E3 1276 V3 Xeon E3 1278L V4 Xeon E3 1280 Xeon E3 1280 V2 Xeon E3 1280 V3 Xeon E3 1280 V5 Xeon E3 1280 V6 Xeon E3 1281 V3 Xeon E3 1285 V3 Xeon E3 1285 V4 Xeon E3 1285 V6 Xeon E3 1285L V3 Xeon E3 1285L V4 Xeon E3 1286 V3 Xeon E3 1286L V3 Xeon E3 1290 Xeon E3 1290 V2 Xeon E3 1501L V6 Xeon E3 1501M V6 Xeon E3 1505L V5 Xeon E3 1505L V6 Xeon E3 1505M V5 Xeon E5 Xeon E5 1428L Xeon E5 1428L V2 Xeon E5 1428L V3 Xeon E5 1620 Xeon E5 1620 V2 Xeon E5 1620 V3 Xeon E5 1620 V4 Xeon E5 1630 V3 Xeon E5 1630 V4 Xeon E5 1650 Xeon E5 1650 V2 Xeon E5 1650 V3 Xeon E5 1650 V4 Xeon E5 1660 Xeon E5 1660 V2 Xeon E5 1660 V3 Xeon E5 1660 V4 Xeon E5 1680 V3 Xeon E5 1680 V4 Xeon E5 2403 Xeon E5 2403 V2 Xeon E5 2407 Xeon E5 2407 V2 Xeon E5 2408L V3 Xeon E5 2418L Xeon E5 2418L V2 Xeon E5 2418L V3 Xeon E5 2420 Xeon E5 2420 V2 Xeon E5 2428L Xeon E5 2428L V2 Xeon E5 2428L V3 Xeon E5 2430 Xeon E5 2430 V2 Xeon E5 2430L Xeon E5 2430L V2 Xeon E5 2438L V3 Xeon E5 2440 Xeon E5 2440 V2 Xeon E5 2448L Xeon E5 2448L V2 Xeon E5 2450 Xeon E5 2450 V2 Xeon E5 2450L Xeon E5 2450L V2 Xeon E5 2470 Xeon E5 2470 V2 Xeon E5 2603 Xeon E5 2603 V2 Xeon E5 2603 V3 Xeon E5 2603 V4 Xeon E5 2608L V3 Xeon E5 2608L V4 Xeon E5 2609 Xeon E5 2609 V2 Xeon E5 2609 V3 Xeon E5 2609 V4 Xeon E5 2618L V2 Xeon E5 2618L V3 Xeon E5 2618L V4 Xeon E5 2620 Xeon E5 2620 V2 Xeon E5 2620 V3 Xeon E5 2620 V4 Xeon E5 2623 V3 Xeon E5 2623 V4 Xeon E5 2628L V2 Xeon E5 2628L V3 Xeon E5 2628L V4 Xeon E5 2630 Xeon E5 2630 V2 Xeon E5 2630 V3 Xeon E5 2630 V4 Xeon E5 2630L Xeon E5 2630L V2 Xeon E5 2630L V3 Xeon E5 2630L V4 Xeon E5 2637 Xeon E5 2637 V2 Xeon E5 2637 V3 Xeon E5 2637 V4 Xeon E5 2640 Xeon E5 2640 V2 Xeon E5 2640 V3 Xeon E5 2640 V4 Xeon E5 2643 Xeon E5 2643 V2 Xeon E5 2643 V3 Xeon E5 2643 V4 Xeon E5 2648L Xeon E5 2648L V2 Xeon E5 2648L V3 Xeon E5 2648L V4 Xeon E5 2650 Xeon E5 2650 V2 Xeon E5 2650 V3 Xeon E5 2650 V4 Xeon E5 2650L Xeon E5 2650L V2 Xeon E5 2650L V3 Xeon E7 Xeon Gold Xeon Platinum Xeon Silver Local Service Management System Cortex A Pentium Silver Itc1500 Firmware Itc1500 Pro Firmware Itc1900 Firmware Itc1900 Pro Firmware Itc2200 Firmware Itc2200 Pro Firmware Ruggedcom Ape Firmware Simatic Et 200 Sp Firmware Simatic Ipc3000 Smart Firmware Simatic Ipc347E Firmware Simatic Ipc427C Firmware Simatic Ipc477C Firmware Simatic Ipc477E Pro Firmware Simotion P320 4E Firmware Sinumerik 840 D Sl Firmware Sinumerik Pcu 50 5 Firmware Sinumerik Tcu 30 3 Firmware Sinema Remote Connect Firmware Micloud Management Portal Mivoic Mx One Mivoice 5000 Mivoice Border Gateway Mivoice Business Mivoice Connect Open Integration Gateway Cloud Global Management System Secure Mobile Access Sonicosv Jetson Tx2 Surface Surface Book Surface Pro Surface Pro With Lte Advanced Surface Studio Arm Mitel

5.5

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-203 ASVS 5.0 V6 - Authentication Timing-safe comparisons
Impact	CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available. EPSS exploitation probability: 46.02%.
Exploit ScenarioDerived	Successful exploitation could compromise the medium-severity affected system.

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

Patch available 46.0% exploitation probability (EPSS)

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AnalysisAI

Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. Public exploit code available and EPSS exploitation probability 46.0%.

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-203. Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4. Affected products include: Intel Atom C, Intel Atom E, Intel Atom X5-E3930, Intel Atom X5-E3940, Intel Atom X7-E3950.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

DescriptionCVE.org

Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4.

Threat Intelligence Overview

Threat Score

4.0/10

Composite threat intelligence

EPSS Score

46.0%

Top 2% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

Citrix

NVD

CVE.org

EPSS

Exploit-DB

VulDB

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 Yes

EPSS 46.0%

Patch available Yes

Active threat Yes

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

Poc

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +46

CVSS: +28

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)CVE.org

cpe:2.3:h:intel:atom_c:c2308:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3308:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3338:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3508:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3538:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3558:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3708:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3750:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3758:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3808:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3830:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3850:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3858:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3950:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3955:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_c:c3958:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_e:e3805:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_e:e3815:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_e:e3825:*:*:*:*:*:*:*

cpe:2.3:h:intel:atom_e:e3826:*:*:*:*:*:*:*

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References

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