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CVE-2017-9248

Published: Jul 3, 2017Updated: Apr 21, 2026 Sources: CVE List NVD BDU csafCWE-522
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
75.1%
Top 0.6%
CISA KEV
Active Exploitation
Since Nov 3, 2021
Exploits
1 Known
Remediation
Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-522

Affected Products

Telerik UITelerik AD
Mixed
OSS Libraries / web-framework
SitefinityTelerik AD
Mixed
OSS Libraries / web-framework
n/an/a
sitefinityprogress
On-premWeb App
Enterprise Software / collaboration-groupware
ui for asp.net ajaxtelerik
Library
DevTools & CI
telerik adcommercialOSS Librariesaka telerik ui, sitefinity
progresscommercialCAEnterprise Softwareaka moveit transfer, ws ftp server, whatsup gold
telerikcommercialDevTools & CI

Attack Graph

Products CVE Techniques Tactics

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Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Nov 3, 2021
Remediation due:May 3, 2022

Required action: Apply updates per vendor instructions.

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available

MITRE ATT&CK

2 techniques
Credential Access
View detailed technique mapping

References

http://www.securityfocus.com/bid/99965
securityfocus.com
http://www.telerik.com/blogs/security-alert-for-telerik-ui-for-asp.net-ajax-and-progress-sitefinity
telerik.com
http://www.telerik.com/support/kb/aspnet-ajax/details/cryptographic-weakness
telerik.com
and 19 more references View all →

Timeline

Published
Jul 3, 2017
Added to CISA KEV
Nov 3, 2021
Last Updated
Apr 21, 2026

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