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Amazon Linux AMI : nss-util / nss,nss-softokn (ALAS-2016-774)

high Nessus Plugin ID 95894

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Synopsis

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

Description

CVE-2016-2834 nss: Multiple security flaws (MFSA 2016-61)

Multiple buffer handling flaws were found in the way NSS handled cryptographic data from the network. A remote attacker could use these flaws to crash an application using NSS or, possibly, execute arbitrary code with the permission of the user running the application.

CVE-2016-8635 nss: small-subgroups attack flaw

It was found that Diffie Hellman Client key exchange handling in NSS was vulnerable to small subgroup confinement attack. An attacker could use this flaw to recover private keys by confining the client DH key to small subgroup of the desired group.

CVE-2016-5285 nss: Missing NULL check in PK11_SignWithSymKey / ssl3_ComputeRecordMACConstantTime causes server crash

A NULL pointer dereference flaw was found in the way NSS handled invalid Diffie-Hellman keys. A remote client could use this flaw to crash a TLS/SSL server using NSS.

Solution

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

Run 'yum update nss' to update your system.

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

See Also

https://alas.aws.amazon.com/ALAS-2016-774.html

Plugin Details

Severity: High

ID: 95894

File Name: ala_ALAS-2016-774.nasl

Version: 3.2

Type: local

Agent: unix

Published: 12/16/2016

Updated: 4/18/2018

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

CVSS v3

Risk Factor: High

Base Score: 8.8

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

Vulnerability Information

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

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

Patch Publication Date: 12/15/2016

Reference Information

CVE: CVE-2016-2834, CVE-2016-5285, CVE-2016-8635

ALAS: 2016-774