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    CVE-2019-18222

    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.

    Published:Jan 23, 2020
    Last Modified:Nov 21, 2024
    EPS:Jan 23, 2020
    EPSS Score:0.0006
    CVSS Score:4.7

    Affected Products

    Vendor
    Arm
    Product
    Mbed Crypto
    Vendor
    Arm
    Product
    Mbed Tls
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-203 Observable Discrepancy

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-189 Black Box Reverse Engineering

    References

    https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3GWQNONS7GRORXZJ7MOJFUEJ2ZJ4OUW/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGDACU65MYZXXVPQP2EBHUJGOR4RWLVY/
    https://tls.mbed.org/tech-updates/security-advisories
    https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-12
    https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3GWQNONS7GRORXZJ7MOJFUEJ2ZJ4OUW/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NGDACU65MYZXXVPQP2EBHUJGOR4RWLVY/
    https://tls.mbed.org/tech-updates/security-advisories
    https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2019-12

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High