Ubuntu 4324-1: Linux kernel vulnerabilities

    Date 07 Apr 2020
    242
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4324-1
    April 07, 2020
    
    linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15,
    linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon
    vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 ESM
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux-aws: Linux kernel for Amazon Web Services (AWS) systems
    - linux-gke-4.15: Linux kernel for Google Container Engine (GKE) systems
    - linux-kvm: Linux kernel for cloud environments
    - linux-oem: Linux kernel for OEM processors
    - linux-oracle: Linux kernel for Oracle Cloud systems
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    - linux-snapdragon: Linux kernel for Snapdragon processors
    - linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems
    - linux-azure: Linux kernel for Microsoft Azure Cloud systems
    - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
    
    Details:
    
    Al Viro discovered that the vfs layer in the Linux kernel contained a use-
    after-free vulnerability. A local attacker could use this to cause a denial
    of service (system crash) or possibly expose sensitive information (kernel
    memory). (CVE-2020-8428)
    
    Shijie Luo discovered that the ext4 file system implementation in the Linux
    kernel did not properly check for a too-large journal size. An attacker
    could use this to construct a malicious ext4 image that, when mounted,
    could cause a denial of service (soft lockup). (CVE-2020-8992)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      linux-image-4.15.0-1037-oracle  4.15.0-1037.41
      linux-image-4.15.0-1057-gke     4.15.0-1057.60
      linux-image-4.15.0-1058-kvm     4.15.0-1058.59
      linux-image-4.15.0-1060-raspi2  4.15.0-1060.64
      linux-image-4.15.0-1065-aws     4.15.0-1065.69
      linux-image-4.15.0-1076-snapdragon  4.15.0-1076.83
      linux-image-4.15.0-1079-oem     4.15.0-1079.89
      linux-image-aws                 4.15.0.1065.67
      linux-image-aws-lts-18.04       4.15.0.1065.67
      linux-image-gke                 4.15.0.1057.61
      linux-image-gke-4.15            4.15.0.1057.61
      linux-image-kvm                 4.15.0.1058.58
      linux-image-oem                 4.15.0.1079.83
      linux-image-oracle-lts-18.04    4.15.0.1037.45
      linux-image-raspi2              4.15.0.1060.58
      linux-image-snapdragon          4.15.0.1076.79
    
    Ubuntu 16.04 LTS:
      linux-image-4.15.0-1037-oracle  4.15.0-1037.41~16.04.1
      linux-image-4.15.0-1060-gcp     4.15.0-1060.64
      linux-image-4.15.0-1065-aws     4.15.0-1065.69~16.04.1
      linux-image-4.15.0-1077-azure   4.15.0-1077.82
      linux-image-aws-hwe             4.15.0.1065.65
      linux-image-azure               4.15.0.1077.80
      linux-image-azure-edge          4.15.0.1077.80
      linux-image-gcp                 4.15.0.1060.74
      linux-image-gke                 4.15.0.1060.74
      linux-image-oracle              4.15.0.1037.30
    
    Ubuntu 14.04 ESM:
      linux-image-4.15.0-1077-azure   4.15.0-1077.82~14.04.1
      linux-image-azure               4.15.0.1077.62
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    ATTENTION: Due to an unavoidable ABI change the kernel updates have
    been given a new version number, which requires you to recompile and
    reinstall all third party kernel modules you might have installed.
    Unless you manually uninstalled the standard kernel metapackages
    (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
    linux-powerpc), a standard system upgrade will automatically perform
    this as well.
    
    References:
      https://usn.ubuntu.com/4324-1
      CVE-2020-8428, CVE-2020-8992
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1065.69
      https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1057.60
      https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1058.59
      https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1079.89
      https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1037.41
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1060.64
      https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1076.83
      https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1065.69~16.04.1
      https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1077.82
      https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1060.64
      https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1037.41~16.04.1
    

    LinuxSecurity Poll

    Do you agree with Linus Torvalds' decision to reject the controversial patch mitigating the Snoop attack on Intel CPUs?

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    [{"id":"100","title":"Yes - this was undoubtedly the right decision.","votes":"0","type":"x","order":"1","pct":0,"resources":[]},{"id":"101","title":"Not sure...","votes":"1","type":"x","order":"2","pct":100,"resources":[]},{"id":"102","title":"No - he made a big mistake here.","votes":"0","type":"x","order":"3","pct":0,"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
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