CVE-2024-8015 Overview
CVE-2024-8015 is an object injection vulnerability in Progress Telerik Report Server versions prior to 2024 Q3 (10.2.24.924). The flaw stems from insecure type resolution during deserialization, allowing an authenticated attacker to trigger remote code execution on the underlying host. The weakness is classified under CWE-470: Use of Externally-Controlled Input to Select Classes or Code, commonly known as unsafe reflection. Progress has documented the issue in its Telerik Knowledge Base advisory.
Critical Impact
A high-privileged attacker with network access can execute arbitrary code on the Report Server, compromising confidentiality, integrity, and availability of hosted reports and connected data sources.
Affected Products
- Progress Telerik Report Server versions prior to 2024 Q3 (10.2.24.924)
- Deployments exposing the Report Server web interface to internal or external networks
- Environments where privileged Report Server accounts are shared or reused
Discovery Timeline
- 2024-10-09 - CVE-2024-8015 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-8015
Vulnerability Analysis
The vulnerability resides in the Report Server's handling of serialized objects. During deserialization, the server resolves types from attacker-controlled input without restricting the set of allowable classes. An authenticated attacker can supply a crafted object graph that instantiates dangerous gadget types when reconstructed.
Once a gadget chain is triggered, the resulting method calls execute in the Report Server process context. This grants the attacker the same privileges as the Report Server service account, which typically holds broad access to report definitions, data source credentials, and scheduling infrastructure. The [CWE-470] classification reflects the root issue: unsafe reflection based on untrusted type identifiers.
Root Cause
The deserialization routine trusts type metadata contained in the incoming payload. Instead of restricting resolution to an allow-list of expected classes, the server loads and instantiates arbitrary types from loaded assemblies. This design allows abuse of well-known .NET gadget chains that convert deserialization into method invocation and command execution.
Attack Vector
Exploitation requires network access to the Report Server endpoint and authenticated context with elevated privileges. The attacker submits a serialized payload to a vulnerable endpoint, and the server reconstructs attacker-selected types during processing. The vulnerability is not exploitable without prior credentials, but privileged accounts, forgotten admin sessions, and lateral movement scenarios reduce this barrier in practice. No public proof-of-concept exploit is currently indexed, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.
Refer to the Progress Telerik Knowledge Base advisory for vendor-supplied technical details.
Detection Methods for CVE-2024-8015
Indicators of Compromise
- Unexpected child processes spawned from the Telerik Report Server process, such as cmd.exe, powershell.exe, or w3wp.exe launching interpreters
- Outbound network connections from the Report Server host to unfamiliar destinations shortly after report generation or API calls
- New or modified files under the Report Server installation directory, including unexpected assemblies or scheduled task definitions
- Authentication events for privileged Report Server accounts originating from unusual source IP addresses
Detection Strategies
- Monitor HTTP request bodies to Report Server endpoints for serialized .NET payload markers and abnormally large POST bodies
- Correlate privileged Report Server logins with subsequent process-creation events on the underlying host
- Alert on reflection and deserialization exceptions logged by the Report Server application
Monitoring Recommendations
- Forward Windows Security, Sysmon, and Report Server application logs to a centralized analytics platform for correlation
- Baseline normal child-process behavior of the Report Server service and alert on deviations
- Track configuration changes to report definitions, data sources, and user roles to detect post-exploitation persistence
How to Mitigate CVE-2024-8015
Immediate Actions Required
- Upgrade Progress Telerik Report Server to version 10.2.24.924 (2024 Q3) or later
- Restrict network access to the Report Server management interface to trusted administrative networks
- Rotate credentials for any privileged Report Server accounts that may have been exposed
- Audit user roles and remove unnecessary administrative privileges to reduce the attacker pool
Patch Information
Progress released a fixed build in Telerik Report Server 2024 Q3 (10.2.24.924). The patch corrects the insecure type resolution behavior during deserialization. Administrators should follow the upgrade procedure documented in the Telerik Knowledge Base advisory and validate the running version after installation.
Workarounds
- Place the Report Server behind a reverse proxy or VPN that enforces strong authentication and IP restrictions
- Enforce multi-factor authentication for all Report Server administrative accounts to raise the cost of credential compromise
- Segment the Report Server host from sensitive backend systems to limit blast radius if the service is compromised
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
