CVE-2024-0801 Overview
CVE-2024-0801 is a denial of service vulnerability affecting Arcserve Unified Data Protection (UDP) versions 8.1 and 9.2. The flaw resides in the ASNative.dll component and can be triggered remotely without authentication. The weakness is categorized under [CWE-75] (failure to sanitize special elements into a different plane). Successful exploitation disrupts the availability of backup and data protection services, impacting business continuity for organizations relying on Arcserve UDP. The vulnerability was disclosed in a Tenable Research advisory and published to the National Vulnerability Database (NVD) on March 13, 2024.
Critical Impact
Remote, unauthenticated attackers can crash or render unresponsive Arcserve UDP services, disrupting backup operations and data recovery workflows.
Affected Products
- Arcserve Unified Data Protection 8.1
- Arcserve Unified Data Protection 9.2
- ASNative.dll component shipped with the above versions
Discovery Timeline
- 2024-03-13 - CVE-2024-0801 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-0801
Vulnerability Analysis
The vulnerability resides within ASNative.dll, a native library used by Arcserve UDP for core data protection operations. An attacker can send crafted network input that triggers improper handling within the library, causing the service to terminate or hang. The flaw affects availability only, with no impact on confidentiality or integrity. The EPSS probability of 41.843% with a percentile of 98.505 indicates a high likelihood of exploitation attempts in the wild relative to other published CVEs.
Root Cause
The root cause is improper neutralization of special elements processed by ASNative.dll, mapped to [CWE-75]. The library fails to validate or sanitize data crossing trust boundaries, allowing malformed input to disrupt execution flow. Public technical details remain limited to the Tenable Research Report.
Attack Vector
The attack vector is network-based and requires no authentication or user interaction. An attacker with network reachability to the Arcserve UDP service can deliver a malformed request that engages the vulnerable code path in ASNative.dll. The resulting service disruption affects backup and restore availability across the protected environment.
No verified public proof-of-concept code is available. Refer to the Tenable Research Report for technical details on the exploitation conditions.
Detection Methods for CVE-2024-0801
Indicators of Compromise
- Unexpected termination or crash of Arcserve UDP services on hosts running versions 8.1 or 9.2
- Repeated service restarts referencing ASNative.dll in Windows Application or System event logs
- Failed or stalled backup jobs coinciding with inbound network connections to Arcserve UDP listeners
Detection Strategies
- Monitor Windows Error Reporting and crash dumps that reference ASNative.dll as the faulting module
- Alert on abnormal restart frequency of Arcserve UDP services such as the Management Service and Agent Service
- Correlate backup job failures with network traffic anomalies directed at Arcserve UDP ports
Monitoring Recommendations
- Ingest Arcserve UDP service logs and Windows event logs into a centralized SIEM for correlation
- Baseline normal backup job duration and success rates to flag deviations indicative of DoS activity
- Restrict and log network access to Arcserve UDP management interfaces from non-administrative segments
How to Mitigate CVE-2024-0801
Immediate Actions Required
- Inventory all hosts running Arcserve UDP and identify systems on versions 8.1 and 9.2
- Apply the latest Arcserve UDP update that addresses CVE-2024-0801 as soon as it is available in your environment
- Restrict network exposure of Arcserve UDP services to trusted management networks only
- Validate that backup job continuity is monitored so disruptions are detected quickly
Patch Information
Consult the Tenable Research Report and Arcserve support channels for the fixed release covering versions 8.1 and 9.2. Upgrade affected installations to the patched build provided by Arcserve.
Workarounds
- Place Arcserve UDP servers behind a firewall that limits inbound access to required administrative source addresses
- Segment backup infrastructure on dedicated VLANs isolated from general user and internet-facing networks
- Implement network access control lists (ACLs) restricting traffic to Arcserve UDP service ports
- Maintain offline or out-of-band backup copies to preserve recovery capability if the primary service is disrupted
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
