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CVE

CVE-2017-8759

Microsoft .NET Framework Remote Code Execution Vulnerability

Microsoft .NET Framework 2.0, 3.5, 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 4.7 allow an attacker to execute code remotely via a malicious document or application, aka ".NET Framework Remote Code Execution Vulnerability.".

HIGH · CVSS 7.8 ⚠ CISA KEV EPSS 0.93965
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  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 0% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules10 YARA rules5
⬢

Required Remediation

Apply updates per vendor instructions.

◆

Threat Actors Linked

5
actorAPT10
actorAPT40
actorMuddyWater
actorNaikon
actorOceanLotus / APT32
⬡

Weakness Classification

CWE-94Improper Control of Generation of Code ('Code Injection')
▤

Affected Products & Versions

1
microsoft .net frameworkall versions
⚠

Public Exploits & PoCs

4
remoteMicrosoft Windows .NET Framework - Remote Code Execution2017-09-13
pocgithub.com · CVE-2017-8759github.com
pocgithub.com · CVE-2017-8759github.com
pocwww.exploit-db.com · 42711www.exploit-db.com
◈

Sigma Hunt Rules

10
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
relatedcriticalAntivirus Exploitation Framework Detection
relatedcriticalAntivirus Password Dumper Detection
relatedcriticalAntivirus Ransomware Detection
relatedcriticalWebshell Remote Command Execution
relatedcriticalPossible Coin Miner CPU Priority Param
relatedcriticalCobalt Strike DNS Beaconing
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 Sep 2017 · 01:29 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
cisaKEV-CVE-2017-8759
msrcCVE-2017-8759Remote Code Execution
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/100742Broken LinkThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039324Broken LinkThird Party AdvisoryVDB Entry
https://github.com/GitHubAssessments/CVE_Assessments_01_2020Third Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8759PatchVendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8759US Government Resource
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