Amazon Linux AMI : kernel (ALAS-2012-100)

This script is Copyright (C) 2013-2014 Tenable Network Security, Inc.


Synopsis :

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

Description :

A flaw was found in the way the Linux kernel's Event Poll (epoll)
subsystem handled large, nested epoll structures. A local,
unprivileged user could use this flaw to cause a denial of service.

A malicious Network File System version 4 (NFSv4) server could return
a crafted reply to a GETACL request, causing a denial of service on
the client.

The rds_ib_xmit function in net/rds/ib_send.c in the Reliable Datagram
Sockets (RDS) protocol implementation in the Linux kernel 3.7.4 and
earlier allows local users to cause a denial of service (BUG_ON and
kernel panic) by establishing an RDS connection with the source IP
address equal to the IPoIB interface's own IP address, as demonstrated
by rds-ping.

See also :

http://www.nessus.org/u?774eb011

Solution :

Run 'yum update kernel' to update your system. You will need to reboot
your system in order for the new kernel to be running.

Risk factor :

Medium / CVSS Base Score : 4.9
(CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C)

Family: Amazon Linux Local Security Checks

Nessus Plugin ID: 69590 ()

Bugtraq ID:

CVE ID: CVE-2011-1083
CVE-2011-4131
CVE-2012-2372