CVE intelligence and bounded remediation

CVE-2017-0247 — A denial of service vulnerability exists when the ASP.NET Core fails to properly validate web requests

High CVSS 7.5

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.

Severity
High
CVSS
7.5 (3.0)
Published
2017-05-12
CISA KEV
Not currently listed
Ecosystem
windows/system
Weaknesses
CWE-20

Affected products

  • microsoft / asp.net_model_view_controller / 1.0.0
  • microsoft / asp.net_model_view_controller / 1.0.1
  • microsoft / asp.net_model_view_controller / 1.0.2
  • microsoft / asp.net_model_view_controller / 1.0.3
  • microsoft / asp.net_model_view_controller / 1.1.0
  • microsoft / asp.net_model_view_controller / 1.1.1

Showing 6 representative product identities from 101 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Resource exhaustion and denial of service

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
  • Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
  • Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.

Remediate safely

  • Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
  • Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
  • Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.

Authoritative sources

Complete CVE record and remediation plan

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