ArchLinux: 202007-5: mbedtls: private key recovery

    Date 31 Jul 2020
    86
    Posted By LinuxSecurity Advisories
    The package mbedtls before version 2.16.7-1 is vulnerable to private key recovery.
    Arch Linux Security Advisory ASA-202007-5
    =========================================
    
    Severity: Medium
    Date    : 2020-07-31
    CVE-ID  : CVE-2020-10932
    Package : mbedtls
    Type    : private key recovery
    Remote  : No
    Link    : https://security.archlinux.org/AVG-1141
    
    Summary
    =======
    
    The package mbedtls before version 2.16.7-1 is vulnerable to private
    key recovery.
    
    Resolution
    ==========
    
    Upgrade to 2.16.7-1.
    
    # pacman -Syu "mbedtls>=2.16.7-1"
    
    The problem has been fixed upstream in version 2.16.7.
    
    Workaround
    ==========
    
    None.
    
    Description
    ===========
    
    A side channel attack has been found on the ECDSA implementation of
    Mbed TLS before 2.22.0, 2.16.6 and 2.7.15, allowing a local attacker
    with access to precise enough timing and memory access information
    (typically an untrusted operating system attacking a secure enclave
    such as SGX or the TrustZone secure world) to fully recover an ECDSA
    private key after observing a number of signature operations.
    
    Impact
    ======
    
    A remote attacker is able to recover an ECDSA private key.
    
    References
    ==========
    
    https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-04
    https://security.archlinux.org/CVE-2020-10932
    

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