Linux Security
    Linux Security
    Linux Security

    Ubuntu 4504-1: OpenSSL vulnerabilities

    Date 16 Sep 2020
    157
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in OpenSSL.
    ==========================================================================
    Ubuntu Security Notice USN-4504-1
    September 16, 2020
    
    openssl, openssl1.0 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in OpenSSL.
    
    Software Description:
    - openssl1.0: Secure Socket Layer (SSL) cryptographic library and tools
    - openssl: Secure Socket Layer (SSL) cryptographic library and tools
    
    Details:
    
    Robert Merget, Marcus Brinkmann, Nimrod Aviram, and Juraj Somorovsky
    discovered that certain Diffie-Hellman ciphersuites in the TLS
    specification and implemented by OpenSSL contained a flaw. A remote
    attacker could possibly use this issue to eavesdrop on encrypted
    communications. This was fixed in this update by removing the insecure
    ciphersuites from OpenSSL. (CVE-2020-1968)
    
    Cesar Pereida García, Sohaib ul Hassan, Nicola Tuveri, Iaroslav Gridin,
    Alejandro Cabrera Aldaya, and Billy Brumley discovered that OpenSSL
    incorrectly handled ECDSA signatures. 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. (CVE-2019-1547)
    
    Guido Vranken discovered that OpenSSL incorrectly performed the x86_64
    Montgomery squaring procedure. While unlikely, a remote attacker could
    possibly use this issue to recover private keys. This issue only affected
    Ubuntu 18.04 LTS. (CVE-2019-1551)
    
    Bernd Edlinger discovered that OpenSSL incorrectly handled certain
    decryption functions. In certain scenarios, a remote attacker could
    possibly use this issue to perform a padding oracle attack and decrypt
    traffic. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-1563)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      libssl1.0.0                     1.0.2n-1ubuntu5.4
    
    Ubuntu 16.04 LTS:
      libssl1.0.0                     1.0.2g-1ubuntu4.17
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4504-1
      CVE-2019-1547, CVE-2019-1551, CVE-2019-1563, CVE-2020-1968
    
    Package Information:
      https://launchpad.net/ubuntu/+source/openssl1.0/1.0.2n-1ubuntu5.4
      https://launchpad.net/ubuntu/+source/openssl/1.0.2g-1ubuntu4.17
    
    

    LinuxSecurity Poll

    'Tis the season of giving! How have you given back to the open-source community?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/49-tis-the-season-of-giving-how-have-you-given-back-to-the-open-source-community?task=poll.vote&format=json
    49
    radio
    [{"id":"171","title":"I've contributed to the development of an open-source project.","votes":"12","type":"x","order":"1","pct":36.36,"resources":[]},{"id":"172","title":"I've reviewed open-source code for security bugs.","votes":"6","type":"x","order":"2","pct":18.18,"resources":[]},{"id":"173","title":"I've made a donation to an open-source project.","votes":"15","type":"x","order":"3","pct":45.45,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350

    Please vote first in order to view vote results.


    VIEW MORE POLLS

    bottom 200

    Please enable / Bitte aktiviere JavaScript!
    Veuillez activer / Por favor activa el Javascript![ ? ]

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.