Amazon Linux 1 Security Advisory: ALAS-2016-703
Advisory Release Date: 2016-05-18 14:00 Pacific
Advisory Updated Date: 2016-05-18 14:00 Pacific
FAQs regarding Amazon Linux ALAS/CVE Severity
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.
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