Home/CVE/A vulnerability exists in certain .Net Framework API's and Visual Studio in the way they parse URL's, aka '.NET Framewor
CVE

CVE-2019-0657

A vulnerability exists in certain .Net Framework API's and Visual Studio in the way they parse URL's, aka '.NET Framewor

A vulnerability exists in certain .Net Framework API's and Visual Studio in the way they parse URL's, aka '.NET Framework and Visual Studio Spoofing Vulnerability'.

MEDIUM · CVSS 5.9 EPSS 0.08017
Monitor
  • EPSS percentile: top 8% of all CVEs by exploitation likelihood
Sigma rules2 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

4
microsoft .net coreall versions
microsoft powershell coreall versions
microsoft visual studio 2017all versions
microsoft .net frameworkall versions
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Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
NuGet Microsoft.NETCore.App MODERATE fixed in 2.2.2
NuGet System.Private.Uri MODERATE fixed in 4.3.2
◈

Sigma Hunt Rules

2
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.
productmediumPowerShell Core DLL Loaded Via Office Application
productmediumPowerShell Core DLL Loaded By Non PowerShell Process
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.0 · 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 NVD05 Mar 2019 · 11:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

2
msrcCVE-2019-0657Spoofing
rhsaRHSA-2019:0349Moderate
🔗

References & Sources

2
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/106890Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0657PatchVendor Advisory
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