CVE intelligence and bounded remediation

CVE-2017-11357 — Telerik UI for ASP.NET AJAX Insecure Direct Object Reference Vulnerability

Critical CVSS 9.8 CISA KEV

Progress Telerik UI for ASP.NET AJAX before R2 2017 SP2 does not properly restrict user input to RadAsyncUpload, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.

Severity
Critical
CVSS
9.8 (3.1)
Published
2017-08-23
CISA KEV
Known exploited
Ecosystem
software/application
Weaknesses
CWE-434

Affected products

  • progress / telerik_ui_for_asp.net_ajax

Matched remediation archetype

Path traversal, unsafe upload, and file handling

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Check exposure

  • Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
  • Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
  • Review canonicalization and containment checks across supported operating systems and storage backends.

Remediate safely

  • Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
  • Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
  • Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.

Authoritative sources

Complete CVE record and remediation plan

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