The remote Ubuntu 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-3777-3 advisory.

    USN-3777-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 %LTS. This update provides the     corresponding updates for the Linux kernel for Azure Cloud systems.

    Jann Horn discovered that the vmacache subsystem did not properly handle sequence number overflows,     leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service     (system crash) or execute arbitrary code. (CVE-2018-17182)

    It was discovered that the paravirtualization implementation in the Linux kernel did not properly handle     some indirect calls, reducing the effectiveness of Spectre v2 mitigations for paravirtual guests. A local     attacker could use this to expose sensitive information. (CVE-2018-15594)

    It was discovered that microprocessors utilizing speculative execution and prediction of return addresses     via Return Stack Buffer (RSB) may allow unauthorized memory reads via sidechannel attacks. An attacker     could use this to expose sensitive information. (CVE-2018-15572)

    Jann Horn discovered that microprocessors utilizing speculative execution and branch prediction may allow     unauthorized memory reads via sidechannel attacks. This flaw is known as Spectre. A local attacker could     use this to expose sensitive information, including kernel memory. (CVE-2017-5715)

    It was discovered that a stack-based buffer overflow existed in the iSCSI target implementation of the     Linux kernel. A remote attacker could use this to cause a denial of service (system crash).
    (CVE-2018-14633)

    Jann Horn and Ken Johnson discovered that microprocessors utilizing speculative execution of a memory read     may allow unauthorized memory reads via a sidechannel attack. This flaw is known as Spectre Variant 4. A     local attacker could use this to expose sensitive information, including kernel memory. (CVE-2018-3639)

    It was discovered that a memory leak existed in the IRDA subsystem of the Linux kernel. A local attacker     could use this to cause a denial of service (kernel memory exhaustion). (CVE-2018-6554)

    It was discovered that a use-after-free vulnerability existed in the IRDA implementation in the Linux     kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute     arbitrary code. (CVE-2018-6555)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel (Azure) vulnerabilities (USN-3777-3)

high Nessus Plugin ID 118322

Version 1.16