CVE-2017-9248
Progress Telerik UI for ASP.NET AJAX and Sitefinity Cryptographic Weakness Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Telerik.Web.UI.dll in Progress Telerik UI for ASP.NET AJAX before R2 2017 SP1 and Sitefinity before 10.0.6412.0 does not properly protect Telerik.Web.UI.DialogParametersEncryptionKey or the MachineKey, which makes it easier for remote attackers to defeat cryptographic protection mechanisms, leading to a MachineKey leak, arbitrary file uploads or downloads, XSS, or ASP.NET ViewState compromise.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 75.10% probability · 100th percentile
- Public exploits
- 1 in Exploit-DB · first 24 January 2018
- CISA KEV
- Listed 3 November 2021 · due 3 May 2022
- Weakness
- CWE-522
- Affected
- progress/sitefinity · telerik/ui for asp.net ajax
- Source
- cve@mitre.org
EPSS 75.1% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2017-9248
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://www.securityfocus.com/bid/99965Broken Link, Third Party Advisory, VDB Entry
- http://www.telerik.com/blogs/security-alert-for-telerik-ui-for-asp.net-ajax-and-progress-sitefinityVendor Advisory
- http://www.telerik.com/support/kb/aspnet-ajax/details/cryptographic-weaknessMitigation, Vendor Advisory
- https://www.exploit-db.com/exploits/43873/Exploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/99965Broken Link, Third Party Advisory, VDB Entry
- http://www.telerik.com/blogs/security-alert-for-telerik-ui-for-asp.net-ajax-and-progress-sitefinityVendor Advisory
- http://www.telerik.com/support/kb/aspnet-ajax/details/cryptographic-weaknessMitigation, Vendor Advisory
- https://www.exploit-db.com/exploits/43873/Exploit, Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-9248US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.