ALAS-2018-1100


Amazon Linux AMI Security Advisory: ALAS-2018-1100
Advisory Release Date: 2018-11-08 00:59 Pacific
Severity: Important

Issue Overview:

An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel. An attacker with a local account can trick the stack unwinder code to leak stack contents to userspace. The fix allows only root to inspect the kernel stack of an arbitrary task.(CVE-2018-17972 )

A vulnerability was discovered in the Linux kernel that allows an attacker to escalate privileges with using a 64-bit ARM architecture. A local attacker with permission to create KVM-based virtual machines can both panic the hypervisor by triggering an illegal exception return (resulting in a DoS) and to redirect execution elsewhere within the hypervisor with full register control, instead of causing a return to the guest.(CVE-2018-18021 )


Affected Packages:

kernel


Issue Correction:
Run yum update kernel to update your system.

New Packages:
i686:
    perf-4.14.77-69.57.amzn1.i686
    kernel-4.14.77-69.57.amzn1.i686
    kernel-devel-4.14.77-69.57.amzn1.i686
    perf-debuginfo-4.14.77-69.57.amzn1.i686
    kernel-debuginfo-common-i686-4.14.77-69.57.amzn1.i686
    kernel-tools-devel-4.14.77-69.57.amzn1.i686
    kernel-debuginfo-4.14.77-69.57.amzn1.i686
    kernel-tools-4.14.77-69.57.amzn1.i686
    kernel-tools-debuginfo-4.14.77-69.57.amzn1.i686
    kernel-headers-4.14.77-69.57.amzn1.i686

src:
    kernel-4.14.77-69.57.amzn1.src

x86_64:
    kernel-devel-4.14.77-69.57.amzn1.x86_64
    kernel-4.14.77-69.57.amzn1.x86_64
    kernel-headers-4.14.77-69.57.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.77-69.57.amzn1.x86_64
    kernel-tools-debuginfo-4.14.77-69.57.amzn1.x86_64
    kernel-tools-devel-4.14.77-69.57.amzn1.x86_64
    perf-debuginfo-4.14.77-69.57.amzn1.x86_64
    perf-4.14.77-69.57.amzn1.x86_64
    kernel-tools-4.14.77-69.57.amzn1.x86_64
    kernel-debuginfo-4.14.77-69.57.amzn1.x86_64