Medium: kernel

2016-08-17T13:30:00
ID ALAS-2016-726
Type amazon
Reporter Amazon
Modified 2016-08-17T13:30:00

Description

Issue Overview:

It was found that nfsd is missing permissions check when setting ACL on files, this may allow a local users to gain access to any file by setting a crafted ACL. (CVE-2016-1237 __)

A flaw was found in the Linux kernel's keyring handling code, where in key_reject_and_link() an uninitialised variable would eventually lead to arbitrary free address which could allow attacker to use a use-after-free style attack. (CVE-2016-4470 __)

A leak of information was possible when issuing a netlink command of the stack memory area leading up to this function call. An attacker could use this to determine stack information for use in a later exploit. (CVE-2016-5243 __)

A vulnerability was found in the Linux kernel in function rds_inc_info_copy of file net/rds/recv.c. The last field "flags" of object "minfo" is not initialized. This can leak data previously at the flags location to userspace. (CVE-2016-5244 __)

A flaw was found in the implementation of the Linux kernel's handling of networking challenge ack where an attacker is able to determine the shared counter which could be used to determine sequence numbers for TCP stream injection. (CVE-2016-5696 __)

(Updated on 2016-08-17: CVE-2016-5696 __ was fixed in this release but was not previously part of this errata)

Affected Packages:

kernel

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

New Packages:

i686:  
    perf-debuginfo-4.4.15-25.57.amzn1.i686  
    kernel-tools-devel-4.4.15-25.57.amzn1.i686  
    kernel-debuginfo-4.4.15-25.57.amzn1.i686  
    perf-4.4.15-25.57.amzn1.i686  
    kernel-debuginfo-common-i686-4.4.15-25.57.amzn1.i686  
    kernel-4.4.15-25.57.amzn1.i686  
    kernel-headers-4.4.15-25.57.amzn1.i686  
    kernel-tools-debuginfo-4.4.15-25.57.amzn1.i686  
    kernel-tools-4.4.15-25.57.amzn1.i686  
    kernel-devel-4.4.15-25.57.amzn1.i686

noarch:  
    kernel-doc-4.4.15-25.57.amzn1.noarch

src:  
    kernel-4.4.15-25.57.amzn1.src

x86_64:  
    kernel-headers-4.4.15-25.57.amzn1.x86_64  
    kernel-tools-devel-4.4.15-25.57.amzn1.x86_64  
    kernel-devel-4.4.15-25.57.amzn1.x86_64  
    kernel-tools-debuginfo-4.4.15-25.57.amzn1.x86_64  
    perf-4.4.15-25.57.amzn1.x86_64  
    kernel-tools-4.4.15-25.57.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-4.4.15-25.57.amzn1.x86_64  
    kernel-debuginfo-4.4.15-25.57.amzn1.x86_64  
    kernel-4.4.15-25.57.amzn1.x86_64  
    perf-debuginfo-4.4.15-25.57.amzn1.x86_64