Buffer Overflow Vulnerability in MBed OS 6.16.0 by Arm
CVE-2024-48981

7.5HIGH

Key Information:

Vendor

Arm
Status
Mbed
Vendor
CVE Published:
20 November 2024

What is CVE-2024-48981?

A buffer overflow vulnerability has been identified in MBed OS version 6.16.0, specifically during the processing of HCI packets. The implementation improperly handles packet header lengths by dynamically determining them based on the first identifying byte. However, in cases where the identifier is invalid, the parsing mechanism fails to discard and does not provide a safe default for unknown packet lengths. This oversight can be exploited to achieve arbitrary write operations by manipulating pointers to unallocated buffers, enabling an attacker to overwrite crucial state variables and potentially modify the function's flow during packet parsing. Such exploitation can lead to significant security risks, including unauthorized access and system compromise.

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References

https://github.com/mbed-ce/mbed-os/blob/54e8693ef4ff7e025...
https://github.com/mbed-ce/mbed-os/pull/374

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

JSON
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