Policy Bypass and Oracle-based Decryption in Mbed TLS
CVE-2021-45450

7.5HIGH

Key Information:

Vendor

Arm
Status
Mbed Tls
Vendor
CVE Published:
21 December 2021

What is CVE-2021-45450?

Mbed TLS versions prior to 2.28.0 and 3.x before 3.1.0 have a vulnerability where the functions psa_cipher_generate_iv and psa_cipher_encrypt can be exploited to bypass security policies. This flaw may allow an untrusted application to access sensitive memory locations, leading to potential oracle-based decryption of encrypted data. It exposes the risk of unauthorized access to protected information, highlighting the importance of upgrading to the latest stable version to mitigate these security threats.

References

https://github.com/ARMmbed/mbedtls/releases/tag/v2.28.0
https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.