CVE-2024-29176: Dell Data Domain OS RCE Vulnerability

CVE-2024-29176 is a remote code execution vulnerability in Dell Data Domain Operating System caused by an out-of-bounds write flaw. Low-privileged attackers can exploit it remotely to execute code. This article covers technical details, affected versions, impact assessment, and mitigation strategies.

CVE-2024-29176 Overview

CVE-2024-29176 is an out-of-bounds write vulnerability [CWE-787] affecting Dell PowerProtect DD (Data Domain) systems. The flaw exists in the Dell Data Domain Operating System (DDOS) versions 8.0, 7.13.1.0, 7.10.1.30, and 7.7.5.40. A low-privileged remote attacker can exploit the vulnerability to trigger code execution on the affected appliance. Dell PowerProtect DD systems provide backup, deduplication, and data protection services for enterprise environments, making them high-value targets. Dell published the fix in advisory DSA-2024-219 on June 26, 2024.

Critical Impact
A low-privileged remote attacker can achieve arbitrary code execution on PowerProtect DD backup appliances, compromising the confidentiality, integrity, and availability of protected data.

Affected Products

Dell Data Domain Operating System (DDOS) versions 8.0, 7.13.1.0, 7.10.1.30, 7.7.5.40
Dell APEX Protection Storage (in-cloud and on-premises)
Dell PowerProtect DD hardware appliances: DD3300, DD6400, DD6900, DD9400, DD9410, DD9900, DD9910, and DM5500

Discovery Timeline

2024-06-26 - CVE-2024-29176 published to the National Vulnerability Database (NVD)
2024-06-26 - Dell releases security advisory DSA-2024-219 with patched firmware
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-29176

Vulnerability Analysis

CVE-2024-29176 is an out-of-bounds write in the Dell Data Domain Operating System, the platform underpinning PowerProtect DD appliances. The vulnerability allows a remote attacker with low privileges (authenticated but non-administrative) to write memory outside the bounds of an allocated buffer. Successful exploitation corrupts adjacent memory structures and can be leveraged to hijack control flow, resulting in code execution in the context of the vulnerable service. Because PowerProtect DD systems store backup data, code execution on these appliances can undermine ransomware recovery strategies and expose sensitive enterprise data.

Root Cause

The issue is classified under [CWE-787: Out-of-Bounds Write]. The affected code path in DDOS does not properly validate the size or offset of data being written into a fixed-size buffer. When an attacker submits crafted input over the network, the write operation extends past the allocated memory region and overwrites adjacent data structures, including potentially function pointers or return addresses.

Attack Vector

The attack is network-reachable and requires authentication with low privileges only. No user interaction is required. An attacker with valid but limited credentials on the appliance's management or data services can send specially crafted requests to the vulnerable component, triggering the out-of-bounds write and executing code on the appliance. Dell has not published exploitation details, and no public proof-of-concept exists at the time of writing.

Refer to the Dell Security Update Advisory DSA-2024-219 for vendor technical details.

Detection Methods for CVE-2024-29176

Indicators of Compromise

Unexpected crashes, restarts, or core dumps of DDOS services on PowerProtect DD appliances
Anomalous authenticated sessions from unusual source addresses that precede service instability
Unexplained changes to backup jobs, retention policies, or system configuration on the appliance

Detection Strategies

Inventory all PowerProtect DD systems and compare running DDOS versions against the fixed releases listed in DSA-2024-219
Monitor authentication logs for low-privileged accounts issuing atypical management API or CLI calls
Correlate DDOS crash telemetry with authenticated network sessions to identify potential exploitation attempts

Monitoring Recommendations

Forward DDOS system logs, audit logs, and authentication events to a centralized SIEM for retention and correlation
Alert on repeated failed logins, privilege changes, or new local accounts on PowerProtect DD systems
Review network flow data for unexpected connections to appliance management interfaces from non-administrative subnets

How to Mitigate CVE-2024-29176

Immediate Actions Required

Apply the DDOS updates published in Dell advisory DSA-2024-219 to all affected DD3300, DD6400, DD6900, DD9400, DD9410, DD9900, DD9910, and DM5500 appliances
Update Dell APEX Protection Storage (in-cloud and on-premises) instances to the fixed release
Rotate credentials for all accounts on PowerProtect DD systems and enforce least-privilege access for management users

Patch Information

Dell has published fixed versions of the Data Domain Operating System and APEX Protection Storage. Full remediation guidance and download links are provided in the Dell Technologies PowerProtect DD Security Update Advisory (DSA-2024-219). Administrators should upgrade DDOS 8.0, 7.13.1.0, 7.10.1.30, and 7.7.5.40 to the releases specified by Dell.

Workarounds

Restrict network access to PowerProtect DD management interfaces to trusted administrative subnets only
Disable unused DDOS accounts and enforce multi-factor authentication where supported
Segment backup infrastructure from general-purpose corporate networks to reduce attacker reachability

bash

# Example: restrict management access with an upstream ACL
# Replace <mgmt-subnet> with your administrative CIDR
iptables -A INPUT -p tcp -s <mgmt-subnet> --dport 22 -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j DROP