ARM mbed-ualloc memory library Integer Overflow or Wraparound
CVE-2021-27433

7.3HIGH

Key Information:

Vendor
Arm
Status
Mbed-ualloc Memory Library
Vendor
CVE Published:
3 May 2022

Summary

ARM mbed-ualloc memory library version 1.3.0 is vulnerable to integer wrap-around in function mbed_krbs, which can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Affected Version(s)

mbed-ualloc memory library 1.3.0

References

https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04
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https://github.com/ARMmbed/mbed-os/pull/14408
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EPSS Score

12% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

David Atch, Omri Ben Bassat, and Tamir Ariel from Microsoft Section 52, and the Azure Defender for IoT research group reported these vulnerabilities to CISA.
.