Amazon Linux AMI : openssl Remote Crash Vulnerability (ALAS-2014-273)

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


Synopsis :

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

Description :

The DTLS retransmission implementation in OpenSSL through 0.9.8y and
1.x through 1.0.1e does not properly maintain data structures for
digest and encryption contexts, which might allow man-in-the-middle
attackers to trigger the use of a different context by interfering
with packet delivery, related to ssl/d1_both.c and ssl/t1_enc.c.

A flaw was found in the way OpenSSL determined which hashing algorithm
to use when TLS protocol version 1.2 was enabled. This could possibly
cause OpenSSL to use an incorrect hashing algorithm, leading to a
crash of an application using the library.

A NULL pointer dereference flaw was found in the way OpenSSL handled
TLS/SSL protocol handshake packets. A specially crafted handshake
packet could cause a TLS/SSL client using OpenSSL to crash.

See also :

http://www.nessus.org/u?4427b35d

Solution :

Run 'yum update openssl' to update your system.

Risk factor :

Medium / CVSS Base Score : 5.8
(CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P)

Family: Amazon Linux Local Security Checks

Nessus Plugin ID: 72291 ()

Bugtraq ID:

CVE ID: CVE-2013-4353
CVE-2013-6449
CVE-2013-6450