THREATPORT/VULNERABILITY/CVE-2017-0247
HIGH SEVERITY

CVE-2017-0247

Asp.Net Model View Controller vulnerability

CVSS
7.5
EPSS
16.9%
EPSS pct
97th
Exploited
No known
A denial of service vulnerability exists when the ASP.NET Core fails to properly validate web requests. NOTE: Microsoft has not commented on third-party claims that the issue is that the TextEncoder.EncodeCore function in the System.Text.Encodings.Web package in ASP.NET Core Mvc before 1.0.4 and 1.1.x before 1.1.3 allows remote attackers to cause a denial of service by leveraging failure to properly calculate the length of 4-byte characters in the Unicode Non-Character range.
Affected vendor
Microsoft
Affected product
Asp.Net Model View Controller
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness type (CWE)
  • CWE-20 — Improper Input Validation
Published
2017-05-12

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to integrity.

Its EPSS score of 16.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2017-0247

  • Confirm whether Microsoft Asp.Net Model View Controller is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-0247.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-0247

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-0247 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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