Vulnerability CVE-2019-18222
Published: 2020-01-23

Description:
The ECDSA signature implementation in ecdsa.c in Arm Mbed Crypto 2.1 and Mbed TLS through 2.19.1 does not reduce the blinded scalar before computing the inverse, which allows a local attacker to recover the private key via side-channel attacks.

Type:

CWE-200

 (Information Exposure)

CVSS2 => (AV:L/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
1.9/10
2.9/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
ARM -> Mbed crypto 
ARM -> Mbed tls 

 References:
https://tls.mbed.org/tech-updates/security-advisories
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-12
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