Amazon Linux 1 Security Advisory: ALAS-2017-782
Advisory Release Date: 2017-01-04 17:00 Pacific
Advisory Updated Date: 2017-02-22 12:00 Pacific
FAQs regarding Amazon Linux ALAS/CVE Severity
A flaw was found in the Linux kernel key management subsystem in which a local attacker could crash the kernel or corrupt the stack and additional memory (denial of service) by supplying a specially crafted RSA key. This flaw panics the machine during the verification of the RSA key. (CVE-2016-8650)
The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 4.8.14 does not properly restrict the type of iterator, which allows local users to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging access to a /dev/sg device. (CVE-2016-9576)
The sock_setsockopt function in net/core/sock.c in the Linux kernel before 4.8.14 mishandles negative values of sk_sndbuf and sk_rcvbuf, which allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option. (CVE-2016-9793)
A flaw was found in the Linux networking subsystem where a local attacker with CAP_NET_ADMIN capabilities could cause an out of bounds read by creating a smaller-than-expected ICMP header and sending to its destination via sendto(). (CVE-2016-8399)
Algorithms not compatible with mcryptd could be spawned by mcryptd with a direct crypto_alloc_tfm invocation using a "mcryptd(alg)" name construct. This causes mcryptd to crash the kernel if an arbitrary "alg" is incompatible and not intended to be used with mcryptd. (CVE-2016-10147)
(Updated on 2017-01-19: CVE-2016-8399 was fixed in this release but was previously not part of this errata.)
(Updated on 2017-02-22: CVE-2016-10147 was fixed in this release but was previously not part of this errata.)
Affected Packages:
kernel
Issue Correction:
Run 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-debuginfo-4.4.39-34.54.amzn1.i686
kernel-headers-4.4.39-34.54.amzn1.i686
kernel-tools-debuginfo-4.4.39-34.54.amzn1.i686
kernel-tools-4.4.39-34.54.amzn1.i686
kernel-debuginfo-common-i686-4.4.39-34.54.amzn1.i686
kernel-4.4.39-34.54.amzn1.i686
kernel-devel-4.4.39-34.54.amzn1.i686
kernel-tools-devel-4.4.39-34.54.amzn1.i686
perf-debuginfo-4.4.39-34.54.amzn1.i686
perf-4.4.39-34.54.amzn1.i686
noarch:
kernel-doc-4.4.39-34.54.amzn1.noarch
src:
kernel-4.4.39-34.54.amzn1.src
x86_64:
perf-4.4.39-34.54.amzn1.x86_64
kernel-tools-debuginfo-4.4.39-34.54.amzn1.x86_64
kernel-4.4.39-34.54.amzn1.x86_64
kernel-devel-4.4.39-34.54.amzn1.x86_64
kernel-headers-4.4.39-34.54.amzn1.x86_64
kernel-tools-4.4.39-34.54.amzn1.x86_64
kernel-debuginfo-common-x86_64-4.4.39-34.54.amzn1.x86_64
kernel-tools-devel-4.4.39-34.54.amzn1.x86_64
perf-debuginfo-4.4.39-34.54.amzn1.x86_64
kernel-debuginfo-4.4.39-34.54.amzn1.x86_64