Medium: kernel

2016-05-18T14:00:00
ID ALAS-2016-703
Type amazon
Reporter Amazon
Modified 2016-05-18T14:00:00

Description

Issue Overview:

The Linux kernel did not properly suppress hugetlbfs support in x86 PV guests, which could allow local PV guest users to cause a denial of service (guest OS crash) by attempting to access a hugetlbfs mapped area. (CVE-2016-3961 __ / XSA-174)

A flaw was found in the way the Linux kernel's ASN.1 DER decoder processed certain certificate files with tags of indefinite length. A local, unprivileged user could use a specially crafted X.509 certificate DER file to crash the system or, potentially, escalate their privileges on the system. (CVE-2016-0758 __)

Multiple race conditions in the ext4 filesystem implementation in the Linux kernel before 4.5 allow local users to cause a denial of service (disk corruption) by writing to a page that is associated with a different user's file after unsynchronized hole punching and page-fault handling. (CVE-2015-8839 __)

The following flaws were also fixed in this version:

CVE-2016-4557 __: Use after free vulnerability via double fdput
CVE-2016-4581 __: Slave being first propagated copy causes oops in propagate_mnt
CVE-2016-4486 __: Information leak in rtnetlink
CVE-2016-4485 __: Information leak in llc module
CVE-2016-4558 __: bpf: refcnt overflow
CVE-2016-4565 __: infiniband: Unprivileged process can overwrite kernel memory using rdma_ucm.ko
CVE-2016-0758 __: tags with indefinite length can corrupt pointers in asn1_find_indefinite_length()
CVE-2015-8839 __: ext4 filesystem page fault race condition with fallocate call.

Affected Packages:

kernel

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

New Packages:

i686:  
    perf-debuginfo-4.4.10-22.54.amzn1.i686  
    kernel-headers-4.4.10-22.54.amzn1.i686  
    kernel-tools-debuginfo-4.4.10-22.54.amzn1.i686  
    perf-4.4.10-22.54.amzn1.i686  
    kernel-4.4.10-22.54.amzn1.i686  
    kernel-debuginfo-common-i686-4.4.10-22.54.amzn1.i686  
    kernel-devel-4.4.10-22.54.amzn1.i686  
    kernel-tools-4.4.10-22.54.amzn1.i686  
    kernel-tools-devel-4.4.10-22.54.amzn1.i686  
    kernel-debuginfo-4.4.10-22.54.amzn1.i686

noarch:  
    kernel-doc-4.4.10-22.54.amzn1.noarch

src:  
    kernel-4.4.10-22.54.amzn1.src

x86_64:  
    kernel-tools-4.4.10-22.54.amzn1.x86_64  
    perf-4.4.10-22.54.amzn1.x86_64  
    kernel-tools-debuginfo-4.4.10-22.54.amzn1.x86_64  
    perf-debuginfo-4.4.10-22.54.amzn1.x86_64  
    kernel-devel-4.4.10-22.54.amzn1.x86_64  
    kernel-4.4.10-22.54.amzn1.x86_64  
    kernel-headers-4.4.10-22.54.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-4.4.10-22.54.amzn1.x86_64  
    kernel-debuginfo-4.4.10-22.54.amzn1.x86_64  
    kernel-tools-devel-4.4.10-22.54.amzn1.x86_64