Amazon Linux AMI : kernel Multiple Vulnerabilities (ALAS-2012-78)

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


Synopsis :

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

Description :

The cap_bprm_set_creds function in security/commoncap.c in the Linux
kernel before 3.3.3 does not properly handle the use of file system
capabilities (aka fcaps) for implementing a privileged executable
file, which allows local users to bypass intended personality
restrictions via a crafted application, as demonstrated by an attack
that uses a parent process to disable ASLR. (CVE-2012-2123)

kernel: unfiltered netdev rio_ioctl access by users (CVE-2012-2313)

kernel: jbd2: unmapped buffer with _Unwritten or _Delay flags set can
lead to DoS (CVE-2011-4086)

See also :

http://www.nessus.org/u?ee9b537a

Solution :

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

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: 69685 ()

Bugtraq ID:

CVE ID: CVE-2011-4086
CVE-2012-2123
CVE-2012-2313