SonicBoom: A New Threat Pathway for Enterprise Takeover
A newly discovered exploitation framework, referred to as “SonicBoom,” has emerged as a severe threat vector, allowing remote actors to circumvent authentication barriers and assume privileged control of enterprise infrastructure. This includes critical systems like SonicWall Secure Mobile Access (SMA) and Commvault’s backup platforms.
Unlike conventional single-vector threats, SonicBoom is a layered, precision-driven exploit chain that combines unauthenticated access points, arbitrary file manipulation, and server-side request forgery (SSRF). When successfully executed, it provides attackers with complete control of the target environment—often without requiring valid credentials.
Anatomy of the SonicBoom Exploit Chain
In findings published by watchTowr, the SonicBoom technique specifically targets flaws in authentication logic and file processing routines. The compromise unfolds through a structured series of stages:
- CVE-2024-38475 — Apache HTTP Server: Arbitrary File Read pre-authentication
- CVE-2023-44221 — Remote Code Execution via Post-Authentication Command Injection
Stage 1: Bypassing Authentication Through Exempt Endpoints
Adversaries begin by locating interfaces that unintentionally skip authentication checks. In Commvault’s on-prem deployment, for instance, a configuration file (authSkipRules.xml) enumerates over 50 endpoints—such as deployWebpackage.do and deployServiceCommcell.do—that are exposed to unauthenticated access.
This allows unauthorized users to directly engage backend logic that is typically reserved for trusted sessions.
Stage 2: SSRF and Arbitrary File Injection via Deployment Endpoints
From there, attackers escalate their foothold by targeting file deployment features. Specially crafted POST requests to deployment endpoints manipulate parameters like commcellName and servicePack. These values are inserted into backend logic without adequate validation, enabling:
- SSRF – redirecting internal server requests to malicious destinations
- Path traversal – writing files into unintended locations within the host file system
The lack of input sanitization effectively turns these endpoints into conduits for full system takeover.
Stage 3: Payload Deployment and Full System Breach
In the final phase of the exploit chain, the compromised system is tricked into retrieving a ZIP archive from an external attacker-controlled host. This archive is silently written to web-accessible directories and unpacked by the appliance. Embedded within it is a malicious .jsp file — typically a covert web shell crafted to enable follow-on attacks.
Once deployed, the threat actor simply issues a standard HTTP request to the implanted file. This activates code execution under the authority of the appliance’s elevated service context, effectively handing over full administrative control.
With unrestricted access, the attacker can:
- Launch additional payloads or lateral movement tools
- Steal sensitive data from the environment
- Maintain persistence or disable defenses
This phase marks the transition from external compromise to complete operational control of the target system.
Underlying Flaw: Weak Input Controls and Lax Access Boundaries
At the heart of the compromise is a failure to rigorously validate incoming data and enforce proper access restrictions. In the case of Commvault, a specific Java method acts as the weak link — serving as the gateway for attackers to manipulate system behavior through unsanitized input and unchecked permissions.
Exploit Amplifier: Abusing Path Traversal for Deeper Infiltration
Attackers further weaponize the exploit chain through directory traversal techniques, particularly by manipulating the servicePack parameter. This allows unauthorized file placement into system paths that were never intended to be publicly writable — effectively laying the groundwork for persistent compromise.
Impacted Platforms & Urgent Mitigations
- Commvault: Builds 11.38.0 through 11.38.19 contain the flaw. A fix is included starting in 11.38.20.
- SonicWall SMA: Actively targeted vulnerabilities such as CVE-2025-23006 and CVE-2024-38475 enable attackers to execute code remotely before authentication, escalating directly to system-wide control.
Defensive Actions: What Needs to Happen Now
Security teams must move quickly to reduce exposure and stop ongoing attack attempts:
- Patch immediately — Upgrade to the latest available software versions without delay.
- Hunt for compromise — Review systems for suspicious admin activity or rogue file uploads.
- Watch your logs — Flag interactions with legacy endpoints now known to be vulnerable.
The SonicBoom exploit chain is a real-world illustration of how routine oversights — like incomplete authentication logic or lax file handling — can open the door to catastrophic breaches. With evidence of exploitation already circulating, proactive remediation isn’t optional — it’s essential.
