CVE-2017-9248
Actively exploited. CVE-2017-9248 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2017-9248 is indexed in Exploit-DB and GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
Progress Telerik UI for ASP.NET AJAX and Sitefinity have a cryptographic weakness in Telerik.Web.UI.dll that can be exploited to disclose encryption keys (Telerik.Web.UI.DialogParametersEncryptionKey and/or the MachineKey), perform cross-site-scripting (XSS) attacks, compromise the ASP.NET ViewState, and/or upload and download files.
CSIRTS triage
- What
- There is a cryptographic weakness that can be exploited to disclose encryption keys and perform XSS attacks.
- Who is affected
- Deployments of Progress Telerik UI for ASP.NET AJAX and Sitefinity.
- Urgency
- Remediation is critical due to active exploitation and the severity of the vulnerabilities.
- Action
- Apply the latest security updates for Telerik UI and Sitefinity.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2017-9248 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- Exploit-DBA public exploit is published in the Exploit-DB archive.look it up ↗
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (1)
- criticalexploitedCVE-2017-9248: Progress Telerik UI for ASP.NET AJAX and Sitefinity Cryptographic Weakness Vulnerabilitycisa-kev · 2021-11-03
External references
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