CVE-2022-48174 Overview
CVE-2022-48174 is a stack overflow vulnerability affecting the ash shell component (ash.c:6030) in BusyBox versions prior to 1.35. This memory corruption flaw enables remote attackers to execute arbitrary code, posing significant risk particularly in Internet of Vehicles (IoV) environments and embedded systems where BusyBox is commonly deployed.
Critical Impact
This vulnerability allows unauthenticated remote attackers to achieve arbitrary code execution through crafted input to the ash shell, potentially leading to complete system compromise in embedded and IoT environments.
Affected Products
- BusyBox versions prior to 1.35
- Debian Linux 11.0
- Various embedded systems and IoT devices using BusyBox
Discovery Timeline
- 2023-08-22 - CVE-2022-48174 published to NVD
- 2025-12-18 - Last updated in NVD database
Technical Details for CVE-2022-48174
Vulnerability Analysis
This vulnerability is classified as CWE-787 (Out-of-Bounds Write), manifesting as a stack overflow condition within the BusyBox ash shell implementation. The flaw exists specifically in ash.c at line 6030, where improper boundary checking allows an attacker to overflow the stack buffer.
The ash shell (Almquist Shell) is a lightweight POSIX-compliant shell commonly used in embedded Linux systems and IoT devices due to its small footprint. BusyBox combines many common Unix utilities into a single executable, making it the preferred solution for resource-constrained environments. This widespread deployment in embedded systems, particularly in automotive and IoV contexts, significantly amplifies the potential impact of this vulnerability.
An attacker exploiting this vulnerability can overwrite critical stack data structures, including return addresses and saved frame pointers, enabling arbitrary code execution with the privileges of the shell process. Given that BusyBox often runs with elevated privileges in embedded systems, successful exploitation can result in complete device compromise.
Root Cause
The root cause is an out-of-bounds write condition in the ash shell's parsing or execution logic at ash.c:6030. The code fails to properly validate input boundaries before writing to stack-allocated buffers, allowing crafted input to exceed allocated memory regions and corrupt adjacent stack memory.
Attack Vector
The vulnerability is exploitable over the network without authentication or user interaction. An attacker can deliver malicious input to the ash shell through:
- Network services that invoke ash for command processing
- Crafted shell scripts or command sequences
- Remote management interfaces in embedded systems
- IoV communication channels that process shell commands
The attack complexity is low, and successful exploitation grants the attacker full confidentiality, integrity, and availability impact on the target system.
The stack overflow in ash.c:6030 occurs when processing certain input patterns that exceed the expected buffer boundaries. The vulnerability allows an attacker to overwrite stack memory, corrupt return addresses, and redirect execution flow to attacker-controlled code. For detailed technical analysis, refer to BusyBox Bug Report #15216.
Detection Methods for CVE-2022-48174
Indicators of Compromise
- Unusual crash patterns or segmentation faults in BusyBox ash processes
- Unexpected process spawning from ash shell with anomalous command-line arguments
- Memory corruption artifacts in system logs related to BusyBox components
- Abnormal network traffic targeting systems running vulnerable BusyBox versions
Detection Strategies
- Monitor BusyBox process execution for stack-related crashes or abnormal termination
- Implement version auditing to identify systems running BusyBox versions prior to 1.35
- Deploy network intrusion detection signatures for suspicious payloads targeting embedded systems
- Utilize SentinelOne's behavioral AI to detect exploitation attempts and post-compromise activities
Monitoring Recommendations
- Enable core dump analysis for BusyBox processes to capture exploitation attempts
- Implement logging for all shell invocations on IoT and embedded devices
- Monitor memory usage patterns for anomalies indicative of buffer overflow exploitation
- Deploy endpoint detection on IoV and embedded platforms where supported
How to Mitigate CVE-2022-48174
Immediate Actions Required
- Upgrade BusyBox to version 1.35 or later immediately on all affected systems
- Audit embedded systems, IoT devices, and IoV platforms for vulnerable BusyBox installations
- Implement network segmentation to isolate vulnerable embedded devices
- Apply available vendor patches for Debian Linux and other affected distributions
Patch Information
BusyBox version 1.35 and later contain the fix for this vulnerability. Organizations should prioritize upgrading all BusyBox installations, particularly on internet-facing and IoV systems. Additional security advisories have been released by Debian LTS and NetApp providing platform-specific guidance.
Workarounds
- Restrict network access to systems running vulnerable BusyBox versions using firewall rules
- Disable ash shell functionality if not required and substitute with alternative shells
- Implement strict input validation at network boundaries for services that interact with BusyBox
- Deploy application-level firewalls to filter potentially malicious input patterns
# Check BusyBox version on affected systems
busybox --help | head -1
# Expected output should show version 1.35 or later
# Restrict network access to embedded devices (example iptables rule)
iptables -A INPUT -d <embedded_device_ip> -j DROP
iptables -A INPUT -s <trusted_network> -d <embedded_device_ip> -j ACCEPT
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
