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Amazon Linux AMI : python-crypto (ALAS-2018-977)

high Nessus Plugin ID 108602

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Synopsis

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

Description

Weak ElGamal key parameters in PublicKey/ElGamal.py allow attackers to obtain sensitive information by reading ciphertext :

lib/Crypto/PublicKey/ElGamal.py in PyCrypto through 2.6.1 generates weak ElGamal key parameters, which allows attackers to obtain sensitive information by reading ciphertext data (i.e., it does not have semantic security in face of a ciphertext-only attack). The Decisional Diffie-Hellman (DDH) assumption does not hold for PyCrypto's ElGamal implementation. (CVE-2018-6594)

Solution

Run 'yum update python-crypto' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2018-977.html

Plugin Details

Severity: High

ID: 108602

File Name: ala_ALAS-2018-977.nasl

Version: 1.2

Type: local

Agent: unix

Published: 3/27/2018

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: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

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

CVSS v3

Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

CPE: cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:python-crypto-debuginfo, p-cpe:/a:amazon:linux:python27-crypto, p-cpe:/a:amazon:linux:python26-crypto

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

Patch Publication Date: 3/21/2018

Reference Information

CVE: CVE-2018-6594

ALAS: 2018-977