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Full vulnerability report · 2018
CVE-2018-8260High confidence

Microsoft .NET Framework: Improper Input Validation

Microsoft · .NET Framework

8.8HighCVSS 3.0
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2018-19926

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

A Remote Code Execution vulnerability exists in .NET software when the software fails to check the source markup of a file, aka ".NET Framework Remote Code Execution Vulnerability." This affects .NET Framework 4.7.2, Microsoft .NET Framework 4.7.2.

What

A Remote Code Execution vulnerability exists in .NET software when the software fails to check the source markup of a file, aka ".NET Framework Remote Code Execution Vulnerability." This affects .NET Framework 4.7.2, Microsoft .NET Framework 4.7.2.

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

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

What

A Remote Code Execution vulnerability exists in .NET software when the software fails to check the source markup of a file, aka ".NET Framework Remote Code Execution Vulnerability." This affects .NET Framework 4.7.2, Microsoft .NET Framework 4.7.2.

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

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

02

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 → Improper Input Validation → execute code or commands in the affected security context
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
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-20 ↗

CWE-20: Improper Input Validation. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

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:R/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.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.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-20
A

Official authority intelligence

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

Canadian Centre for Cyber Security · English · AV18-112Microsoft security updates

This advisory covers multiple support package deployments addressing multiple vulnerabilities in various Microsoft products. Products Affected: Adobe Flash Player ASP.NET ChakraCore Internet Explorer PowerShell Editor Services PowerShell Extension for Visual Studio Code Microsoft Edge Microsoft Lync Microsoft Office Microsoft Office Services and Web Apps Microsoft Research JavaScript Cryptography Library Microsoft Visual Studio Microsoft Windows Microsoft Wireless Display Adapter V2 Software Microsoft .NET Framework Skype for Business Web Customizations for Active Directory Federation Services CVE References: CVE-2018-8260, CVE-2018-8281, CVE-2018-8282, CVE-2018-8282, CVE-2018-8299, CVE-2018-8300, CVE-2018-8310, CVE-2018-8323, CVE-2018-8326, CVE-2018-8327

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-337Multiples vulnérabilités dans Microsoft .Net

De multiples vulnérabilités ont été corrigées dans Microsoft .Net . Elles permettent à un attaquant de provoquer une élévation de privilèges, une exécution de code à distance et un contournement de la fonctionnalité de sécurité.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2018-007187Microsoft .NET Framework においてリモートでコードを実行される脆弱性

Microsoft .NET Framework には、ファイルのソースマークアップのチェックに失敗した場合、リモートでコードを実行される脆弱性が存在します。 ベンダは、本脆弱性を「.NET Framework のリモートでコードが実行される脆弱性」として公開しています。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-4896MS 7월 보안 위협에 따른 정기 보안 업데이트 권고

er 보안 업데이트 ##### □ 설명 o 이용자가 특수하게 제작된 악성 문서를 열람할 경우, 원격코드실행을 허용하는 취약점 o 관련취약점 : - 원격코드실행 취약점(CVE-2018-8300) - 권한상승 취약점(CVE-2018-8299,CVE-2018-8323) o 영향 : 원격코드실행 o 중요도 : 중요 o 관련 KB번호 - 4022243, 4022228, 4022235 ##### □ 해결책 o 영향 받는 소프트웨어를 이용하는 경우 마이크로소프트사의 보안 패치 적용 12. Lync 보안 업데이트 ##### □ 설명 o 공격자가 특수하게 제작된 악성 응용 프로그램을 실행할 경우, 원격코드실행을 허용하는 취약점 o 관련취약점 : - 원격코드실행 취약점(CVE-2018-8311) - 보안기능 우회 취약점(CVE-2018-8238) o 영향 : 원격코드실행 o 중요도 : 중요 o 관련 KB번호 - 4022225 ##### □ 해결책 o 영향 받는 소프트웨어를 이용하는 경우 마이크로소프트사의 보안 패치 적용 13. .NET, .NET CORE, ASP.NET, ASP.NET Core 보안 업데이트 ##### □ 설명 o 공격자가 특수하게 제작된 악성 응용 프로그램을 실행할 경우, 원격코드실행을 허용하는 취약점 o 관련취약점 : - 원격코드실행 취약점(CVE-2018-8260,CVE-2018-8284,CVE-2018-8327) - 권한상승 취약점(CVE-2018-8202) - 보안기능 우회 취약점(CVE-2018-8171,CVE-2018-8356) o 영향 : 원격코드실행 o 중요도 : 중요 o 관련 KB번호 - 4339279, 4338423, 4338612, 4338424, 4338613, 4338421, 4338610, 4338814, 4338829, 4338826, 4338825, 4338420, 4338606, 4338419, 4338605, 4338418, 4338604, 4338819, 4338417, 4338602, 4338415, 4338600, 4338416, 4338601, 4338422, 4338611 ##### □ 해결책 o 영향 받는 소프트웨어를 이용하는 경우 마이크로소프트사의 보안 패치 적용 14. Adobe Flash Player 보안 업데이트 ##### □ 설명 o 지원되는 모든 버전의 Windows 8.1, Windows Server 2012, Windows Server 2012 R2, Windows RT 8.1, Windows 10 및 Windows Server 2016에 설치된 Adobe Flash Player의 취약점을 해결 o 관련취약점 : - Adobe 보안 업데이트 APSB1

Official advisory ↗
03

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.
Fix not verified
Affected
  • .NET Framework: 4.7.2 Developer Pack
  • Microsoft .NET Framework: 4.7.2 on Windows 10 Version 1607 for 32-bit Systems, 4.7.2 on Windows 10 Version 1607 for x64-based Systems, 4.7.2 on Windows 10 Version 1703 for 32-bit Systems, 4.7.2 on Windows 10 Version 1703 for x64-based Systems, 4.7.2 on Windows 10 Version 1709 for 32-bit Systems, 4.7.2 on Windows 10 Version 1709 for x64-based Systems, 4.7.2 on Windows 10 Version 1803 for 32-bit Systems, 4.7.2 on Windows 10 Version 1803 for x64-based Systems, 4.7.2 on Windows 7 for 32-bit Systems Service Pack 1, 4.7.2 on Windows 7 for x64-based Systems Service Pack 1, 4.7.2 on Windows 8.1 for 32-bit systems, 4.7.2 on Windows 8.1 for x64-based systems, 4.7.2 on Windows RT 8.1, 4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1, 4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), 4.7.2 on Windows Server 2012, 4.7.2 on Windows Server 2012 (Server Core installation), 4.7.2 on Windows Server 2012 R2, 4.7.2 on Windows Server 2012 R2 (Server Core installation), 4.7.2 on Windows Server 2016, 4.7.2 on Windows Server 2016 (Server Core installation), 4.7.2 on Windows Server, version 1709 (Server Core Installation), 4.7.2 on Windows Server, version 1803 (Server Core Installation)
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
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.
04

Evidence and provenance

Published 11 Jul 2018 · Last source change 5 Aug 2024, 06:46 UTC · CWE-20 · Improper Input Validation

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
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-2018-19926
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. Vendor guidanceAuthoritative vendor guidance changed from no authoritative guidance recorded to vendor advisory.
    Before
    no authoritative guidance recorded
    After
    vendor advisory
    af854a3a-2127-422b-91ae-364da2661108 ↗
  2. SeveritySeverity changed from Unknown to High.
    Before
    Unknown
    After
    High
    NIST NVD ↗
  3. CVSS scoreCVSS score changed from not recorded to 8.8 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
    Before
    not recorded
    After
    8.8 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
    NIST NVD ↗
  4. ENISA EUVD mappingEUVD-2018-19926 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2018-19926"}
    ENISA EUVD ↗
  5. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2018-19926↗Vendor advisory↗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.
Free version - for non-commercial use only.CVE-2018-8260 · cve.blacktree.nl