Amazon Linux 1 Security Advisory: ALAS-2014-455
Advisory Release Date: 2014-12-03 22:27 Pacific
Advisory Updated Date: 2014-12-18 14:55 Pacific
FAQs regarding Amazon Linux ALAS/CVE Severity
The sctp_process_param function in net/sctp/sm_make_chunk.c in the SCTP implementation in the Linux kernel before 3.17.4, when ASCONF is used, allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via a malformed INIT chunk. (CVE-2014-7841)
The pivot_root implementation in fs/namespace.c in the Linux kernel through 3.17 does not properly interact with certain locations of a chroot directory, which allows local users to cause a denial of service (mount-tree loop) via . (dot) values in both arguments to the pivot_root system call. (CVE-2014-7970)
The do_double_fault function in arch/x86/kernel/traps.c in the Linux kernel through 3.17.4 does not properly handle faults associated with the Stack Segment (SS) segment register, which allows local users to cause a denial of service (panic) via a modify_ldt system call, as demonstrated by sigreturn_32 in the linux-clock-tests test suite. (CVE-2014-9090)
A flaw was found in the way the Linux kernel handled GS segment register base switching when recovering from a #SS (stack segment) fault on an erroneous return to user space. A local, unprivileged user could use this flaw to escalate their privileges on the system. (CVE-2014-9322)
Affected Packages:
kernel
Issue Correction:
Run yum clean all followed by yum update kernel to update your system. You will need to reboot your system in order for the new kernel to be running.
i686:
kernel-3.14.26-24.46.amzn1.i686
kernel-debuginfo-3.14.26-24.46.amzn1.i686
perf-debuginfo-3.14.26-24.46.amzn1.i686
kernel-devel-3.14.26-24.46.amzn1.i686
kernel-tools-devel-3.14.26-24.46.amzn1.i686
kernel-debuginfo-common-i686-3.14.26-24.46.amzn1.i686
kernel-tools-3.14.26-24.46.amzn1.i686
perf-3.14.26-24.46.amzn1.i686
kernel-headers-3.14.26-24.46.amzn1.i686
kernel-tools-debuginfo-3.14.26-24.46.amzn1.i686
noarch:
kernel-doc-3.14.26-24.46.amzn1.noarch
src:
kernel-3.14.26-24.46.amzn1.src
x86_64:
kernel-headers-3.14.26-24.46.amzn1.x86_64
kernel-devel-3.14.26-24.46.amzn1.x86_64
kernel-tools-debuginfo-3.14.26-24.46.amzn1.x86_64
kernel-tools-devel-3.14.26-24.46.amzn1.x86_64
kernel-debuginfo-common-x86_64-3.14.26-24.46.amzn1.x86_64
kernel-tools-3.14.26-24.46.amzn1.x86_64
perf-3.14.26-24.46.amzn1.x86_64
kernel-debuginfo-3.14.26-24.46.amzn1.x86_64
kernel-3.14.26-24.46.amzn1.x86_64
perf-debuginfo-3.14.26-24.46.amzn1.x86_64