CVE-2024-32631 Overview
CVE-2024-32631 is an out-of-bounds read vulnerability [CWE-125] in the ciCCIOTOPT function of ASR Micro ASR180X series firmware. The flaw causes the affected component to read memory outside the bounds of an intended buffer, leading to incorrect computations within the cellular baseband and IoT firmware stack. The issue affects a broad range of ASR Micro chipsets including the ASR160X, ASR180X, and ASR360X product families used in embedded and IoT devices.
The vulnerability was published to the National Vulnerability Database on April 16, 2024. Successful exploitation can compromise confidentiality, integrity, and availability, and the scope is changed, meaning impact can extend beyond the vulnerable component.
Critical Impact
An out-of-bounds read in ciCCIOTOPT produces incorrect computations that can affect confidentiality, integrity, and availability of the affected ASR180X firmware and downstream device functionality.
Affected Products
- ASR Micro ASR160X firmware and hardware (ASR1602, ASR1603, ASR1605, ASR1606, ASR1607, ASR1609)
- ASR Micro ASR180X firmware and hardware (ASR1803, ASR1803SC, ASR1806)
- ASR Micro ASR360X firmware and hardware (ASR3602, ASR3603, ASR3605, ASR3607)
Discovery Timeline
- 2024-04-16 - CVE-2024-32631 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-32631
Vulnerability Analysis
The vulnerability resides in the ciCCIOTOPT function within ASR180X firmware. The function performs a read operation that extends past the allocated bounds of a source buffer. When the out-of-bounds data is consumed by subsequent logic, the function returns or propagates incorrect computational results.
Because the affected code operates within cellular and IoT firmware components, incorrect computations can influence protocol handling, session state, and connected device behavior. The scope is changed, indicating that exploitation can affect components beyond the immediate vulnerable module. High attack complexity and required high privileges limit the population of attackers capable of triggering the flaw remotely.
Root Cause
The root cause is an improper bounds check in ciCCIOTOPT before reading from a memory buffer [CWE-125]. The function trusts input-derived length or offset values without validating them against the actual size of the source buffer. When crafted or malformed input directs the read past the buffer boundary, adjacent memory is consumed as valid data.
Attack Vector
The attack vector is network-based. An attacker with existing high-level privileges on a system that interacts with the affected firmware can supply input that triggers the out-of-bounds read in ciCCIOTOPT. The resulting incorrect computations can be leveraged to corrupt state, leak information from adjacent memory regions, or cause the firmware to enter an inconsistent operational condition.
No public proof-of-concept exploit is currently available for CVE-2024-32631, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the ASR Micro PSIRT Resource for authoritative technical details.
Detection Methods for CVE-2024-32631
Indicators of Compromise
- Unexpected crashes, resets, or watchdog-triggered reboots on ASR160X, ASR180X, or ASR360X-based devices
- Anomalous cellular or IoT protocol messages preceding device instability
- Firmware log entries referencing faults or memory access errors in ciCCIOTOPT or adjacent baseband modules
Detection Strategies
- Maintain an accurate hardware and firmware inventory to identify devices built on affected ASR Micro chipsets
- Monitor upstream network traffic to and from IoT and cellular devices for malformed protocol frames targeting baseband processing
- Correlate device instability events with recent network exposure to detect probing or exploitation attempts
Monitoring Recommendations
- Ingest device syslog, crash dumps, and cellular management telemetry into a centralized analytics platform for anomaly detection
- Baseline normal firmware behavior and alert on deviations such as repeated resets or unexpected reconfiguration of IoT options
- Track vendor advisories from ASR Micro PSIRT for firmware updates and revised guidance on affected SKUs
How to Mitigate CVE-2024-32631
Immediate Actions Required
- Inventory all deployed devices that incorporate affected ASR160X, ASR180X, or ASR360X chipsets
- Contact device OEMs to obtain patched firmware images that address the out-of-bounds read in ciCCIOTOPT
- Restrict network exposure of affected devices, particularly interfaces reachable by untrusted parties
Patch Information
ASR Micro publishes remediation guidance through its Product Security Incident Response Team. Review the ASR Micro PSIRT Resource for the current advisory covering CVE-2024-32631 and coordinate with the device manufacturer for firmware updates specific to your hardware revision.
Workarounds
- Segment affected IoT and cellular devices onto isolated network zones with strict egress filtering
- Disable or restrict access to management interfaces that expose the vulnerable ciCCIOTOPT code path
- Enforce authentication and access controls to reduce the pool of principals able to reach the high-privilege attack surface
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
