Ubuntu 3840-1: OpenSSL vulnerabilities

    Date06 Dec 2018
    CategoryUbuntu
    5183
    Posted ByAnthony Pell
    Several security issues were fixed in OpenSSL.
    ==========================================================================
    Ubuntu Security Notice USN-3840-1
    December 06, 2018
    
    openssl, openssl1.0 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.10
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in OpenSSL.
    
    Software Description:
    - openssl: Secure Socket Layer (SSL) cryptographic library and tools
    - openssl1.0: Secure Socket Layer (SSL) cryptographic library and tools
    
    Details:
    
    Samuel Weiser discovered that OpenSSL incorrectly handled DSA signing. An
    attacker could possibly use this issue to perform a timing side-channel
    attack and recover private DSA keys. (CVE-2018-0734)
    
    Samuel Weiser discovered that OpenSSL incorrectly handled ECDSA signing. An
    attacker could possibly use this issue to perform a timing side-channel
    attack and recover private ECDSA keys. This issue only affected Ubuntu
    18.04 LTS and Ubuntu 18.10. (CVE-2018-0735)
    
    Billy Bob Brumley, Cesar Pereida Garcia, Sohaib ul Hassan, Nicola Tuveri,
    and Alejandro Cabrera Aldaya discovered that Simultaneous Multithreading
    (SMT) architectures are vulnerable to side-channel leakage. This issue is
    known as "PortSmash". An attacker could possibly use this issue to perform
    a timing side-channel attack and recover private keys. (CVE-2018-5407)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.10:
      libssl1.0.0                     1.0.2n-1ubuntu6.1
      libssl1.1                       1.1.1-1ubuntu2.1
    
    Ubuntu 18.04 LTS:
      libssl1.0.0                     1.0.2n-1ubuntu5.2
      libssl1.1                       1.1.0g-2ubuntu4.3
    
    Ubuntu 16.04 LTS:
      libssl1.0.0                     1.0.2g-1ubuntu4.14
    
    Ubuntu 14.04 LTS:
      libssl1.0.0                     1.0.1f-1ubuntu2.27
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3840-1
      CVE-2018-0734, CVE-2018-0735, CVE-2018-5407
    
    Package Information:
      https://launchpad.net/ubuntu/+source/openssl/1.1.1-1ubuntu2.1
      https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu6.1
      https://launchpad.net/ubuntu/+source/openssl/1.1.0g-2ubuntu4.3
      https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu5.2
      https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu4.14
      https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.27
    
    
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