Amazon Linux AMI : kernel (ALAS-2017-901)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Amazon Linux AMI host is missing a security update.

Description :

A buffer overflow was discovered in tpacket_rcv() function in the
Linux kernel since v4.6-rc1 through v4.13. A number of socket-related
syscalls can be made to set up a configuration when each packet
received by a network interface can cause writing up to 10 bytes to a
kernel memory outside of a kernel buffer. This can cause unspecified
kernel data corruption effects, including damage of in-memory and
on-disk XFS data. (CVE-2017-14497)

A kernel data leak due to an out-of-bound read was found in the Linux
kernel in inet_diag_msg_sctp{,l}addr_fill() and sctp_get_sctp_info()
functions present since version 4.7-rc1 through version 4.13. A data
leak happens when these functions fill in sockaddr data structures
used to export socket's diagnostic information. As a result, up to 100
bytes of the slab data could be leaked to a userspace. (CVE-2017-7558)

See also :

https://alas.aws.amazon.com/ALAS-2017-901.html

Solution :

Run 'yum update kernel' to update your system.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)

Family: Amazon Linux Local Security Checks

Nessus Plugin ID: 103653 ()

Bugtraq ID:

CVE ID: CVE-2017-14497
CVE-2017-7558

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