CVE-2019-18935 on CISA KEV
Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can
CISA KEV — Actively Exploited
Progress Telerik UI for ASP.NET AJAX Deserialization of Untrusted Data Vulnerability
Vendor / Product
— / Progress / Telerik UI for ASP.NET AJAX
CVSS / EPSS
— — · EPSS 93.58%
01What CISA says about this vulnerability
Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not…
02Required action — verbatim from CISA
Apply updates per vendor instructions.
03Notes & references
- www.telerik.com — https://www.telerik.com/support/whats-new/release-history
- codewhitesec.blogspot.com — https://codewhitesec.blogspot.com/2019/02/telerik-revisited.html
- www.telerik.com — https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializ…
- github.com — https://github.com/bao7uo/RAU_crypto
- know.bishopfox.com — https://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-tele…
- github.com — https://github.com/noperator/CVE-2019-18935
- packetstormsecurity.com — http://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.htm…
- www.telerik.com — https://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp…
- packetstormsecurity.com — http://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUplo…
- www.bleepingcomputer.com — https://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-ol…
04SARA's analyst layer — why this matters
This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.
05Affected products (summary)
| Vendor | Product | Versions |
|---|
| n | a / n/a | n/a |
06Detection
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