CVE-2019-16910 Information

Description

Arm Mbed TLS before 2.19.0 and Arm Mbed Crypto before 2.0.0 when deterministic ECDSA is enabled use an RNG with insufficient entropy for blinding which might allow an attacker to recover a private key via side-channel attacks if a victim signs the same message many times. (For Mbed TLS the fix is also available in versions 2.7.12 and 2.16.3.)

CVSS Vector

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

Reference

https://github.com/ARMmbed/mbedtls/commit/298a43a77ec0ed2c19a8c924ddd8571ef3e65dfd https://github.com/ARMmbed/mbedtls/commit/33f66ba6fd234114aa37f0209dac031bb2870a9b https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CGSKQSGR5SOBRBXDSSPTCDSBB5K3GMPF/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CSFFOROD6IVLADZHNJC2LPDV7FQRP7XB/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PEHHH2DOBXB25CAU3Q6E66X723VAYTB5/ https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-10

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3