Amazon Linux AMI : nss / nss-util (ALAS-2015-569) (Logjam)

medium Nessus Plugin ID 84929
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VPR Score: 2.2

Synopsis

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

Description

A flaw was found in the way the TLS protocol composes the Diffie-Hellman (DH) key exchange. A man-in-the-middle attacker could use this flaw to force the use of weak 512 bit export-grade keys during the key exchange, allowing them do decrypt all traffic.
(CVE-2015-4000)

Please note that this update forces the TLS/SSL client implementation in NSS to reject DH key sizes below 768 bits, which prevents sessions to be downgraded to export-grade keys. Future updates may raise this limit to 1024 bits.

Solution

Run 'yum update nss nss-util' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2015-569.html

Plugin Details

Severity: Medium

ID: 84929

File Name: ala_ALAS-2015-569.nasl

Version: 2.4

Type: local

Agent: unix

Published: 7/23/2015

Updated: 4/18/2018

Dependencies: ssh_get_info.nasl

Risk Information

Risk Factor: Medium

VPR Score: 2.2

CVSS v2.0

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

CVSS v3.0

Base Score: 3.7

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:nss, p-cpe:/a:amazon:linux:nss-debuginfo, p-cpe:/a:amazon:linux:nss-devel, p-cpe:/a:amazon:linux:nss-pkcs11-devel, p-cpe:/a:amazon:linux:nss-sysinit, p-cpe:/a:amazon:linux:nss-tools, p-cpe:/a:amazon:linux:nss-util, p-cpe:/a:amazon:linux:nss-util-debuginfo, p-cpe:/a:amazon:linux:nss-util-devel, cpe:/o:amazon:linux

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Patch Publication Date: 7/22/2015

Reference Information

CVE: CVE-2015-4000

ALAS: 2015-569

RHSA: 2015:1185