CVE-2021-27433 — HIGH (7.3)

Vulnerability Description

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.

CVSS Score

7.3

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

LOW

Affected Products

Vendor	Product	Versions
Arm	Mbed Ualloc	1.3.0

Related Weaknesses (CWE)

CWE-190

References

https://github.com/ARMmbed/mbed-os/pull/14408Issue TrackingPatchThird Party Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04Third Party AdvisoryUS Government Resource
https://github.com/ARMmbed/mbed-os/pull/14408Issue TrackingPatchThird Party Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04Third Party AdvisoryUS Government Resource

FAQ

What is CVE-2021-27433?

CVE-2021-27433 is a vulnerability with a CVSS score of 7.3 (HIGH). 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...

How severe is CVE-2021-27433?

CVE-2021-27433 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-27433?

Check the references section above for vendor advisories and patch information. Affected products include: Arm Mbed Ualloc.