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CVE-2017-0249

HIGH

CVE-2017-0249 is a high-severity (CVSS 7.3) Improper Input Validation vulnerability in microsoft asp.net model view controller. O3 Security detects and blocks CVE-2017-0249 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.

An elevation of privilege vulnerability exists when the ASP.NET Core fails to properly sanitize web requests.

Published
May 12, 2017
Updated
Jun 17, 2026
Affected
0 pkgs
Patched
None yet
Exploits
None indexed

Description

An elevation of privilege vulnerability exists when the ASP.NET Core fails to properly sanitize web requests.

Affected Products

18 products · 101 configurations
Application
asp.net model view controllermicrosoft
7 versions
1.0.01.0.11.0.21.0.31.1.01.1.11.1.2
Application
microsoft.aspnetcore.mvc.abstractionsmicrosoft
7 versions
1.0.01.0.11.0.21.0.31.1.01.1.11.1.2
Application
microsoft.aspnetcore.mvc.apiexplorermicrosoft
7 versions
1.0.01.0.11.0.21.0.31.1.01.1.11.1.2
Application
microsoft.aspnetcore.mvc.corsmicrosoft
7 versions
1.0.01.0.11.0.21.0.31.1.01.1.11.1.2
Application
microsoft.aspnetcore.mvc.dataannotationsmicrosoft
7 versions
1.0.01.0.11.0.21.0.31.1.01.1.11.1.2
Application
microsoft.aspnetcore.mvc.formatters.jsonmicrosoft
7 versions
1.0.01.0.11.0.21.0.31.1.01.1.11.1.2

Detection & mitigation playbook

Vendor / appliance
  1. Detect

    Inventory every microsoft asp.net model view controller deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for exploitation at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.

  2. Remediation status

    No patch has shipped for CVE-2017-0249 yet — track the microsoft asp.net model view controller advisory for a fixed release and apply the workarounds below in the meantime.

  3. Mitigate without a patch

    Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.

  4. How O3 protects you

    O3 detects and blocks CVE-2017-0249 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Tailored to CVE-2017-0249. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

An elevation of privilege vulnerability exists when the ASP.NET Core fails to properly sanitize web requests.
O3 Security · Runtime Protection

Is CVE-2017-0249 being exploited in your environment?

O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2017-0249 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.