CVE-2017-11317
Published: April 11, 2022
Official Description
Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX allows remote attackers to perform arbitrary file uploads or execute arbitrary code.
CISA KEV Advisory
Telerik UI for ASP.NET AJAX Unrestricted File Upload Vulnerability
Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX allows remote attackers to perform arbitrary file uploads or execute arbitrary code.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in Telerik.Web.UI for Progress Telerik UI for ASP.NET AJAX allows remote attackers to perform arbitrary file uploads or execute arbitrary code. The high EPSS score of 0.91984 and its presence in CISA's KEV catalog indicate a very high likelihood of exploitation, making this an urgent concern.
Active exploitation of this vulnerability has been observed in the wild, and it is listed in CISA's Known Exploited Vulnerabilities catalog. The flaw is remotely exploitable.
Apply all available patches and updates for Progress Telerik UI for ASP.NET AJAX. Review and harden web server configurations to prevent unauthorized file uploads.
Technical Analysis
CVE-2017-11317 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2017-11317 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2017-11317 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1