Flaw in ECDSA Signature Implementation in Arm Mbed Crypto and Mbed TLS
CVE-2019-18222

4.7MEDIUM

Key Information:

Vendor

Arm
Status
Mbed Tls
Mbed Crypto
Vendor
CVE Published:
23 January 2020

What is CVE-2019-18222?

A vulnerability exists in the ECDSA signature implementation within Arm Mbed Crypto and Mbed TLS. The issue arises from insufficient reduction of the blinded scalar before computing the inverse, which can be exploited by a local attacker. Through side-channel attacks, this flaw can lead to the potential recovery of private keys, posing a significant risk to the cryptographic integrity of affected systems.

References

https://tls.mbed.org/tech-updates/security-advisories
https://tls.mbed.org/tech-updates/security-advisories/mbe...
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisory

CVSS V3.1

Score:
4.7
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2019-18222 : Flaw in ECDSA Signature Implementation in Arm Mbed Crypto and Mbed TLS