CVE-2017-11357 is an input validation flaw in the RadAsyncUpload component of Progress Telerik UI for ASP.NET AJAX affecting versions before R2 2017 SP2. The vulnerable implementation does not properly restrict user-supplied input to the upload handler, allowing an unauthenticated remote attacker to abuse RadAsyncUpload to place attacker-controlled files on the server. In affected deployments, this can be leveraged for arbitrary file upload and, depending on server configuration and placement of the uploaded content, can lead to remote code execution. The issue is associated with older Telerik Web UI releases and has been referenced as one of the vulnerabilities attackers may use to obtain material needed for subsequent exploitation of later Telerik flaws.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a Python exploit script (RAU_crypto.py) targeting multiple vulnerabilities in Telerik UI for ASP.NET AJAX, specifically CVE-2017-11317, CVE-2017-11357 (arbitrary file upload and insecure direct object reference), and CVE-2019-18935 (.NET deserialization). The exploit enables attackers to upload arbitrary files to the server and execute arbitrary code via deserialization of attacker-supplied .NET assemblies, either from local or remote (SMB) sources. The script supports custom payloads, encryption/decryption of rauPostData, and can test for the target's ability to load remote payloads. The README provides detailed usage instructions, example commands, and context about the vulnerabilities. The main attack vector is network-based, targeting the Telerik WebResource.axd endpoint. The repository is operational and suitable for real-world exploitation given the correct target configuration and knowledge of required keys.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.