Detections
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Amazon Linux AMI : openssl (ALAS-2015-564)
medium Nessus Plugin ID 84647
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Synopsis
The remote Amazon Linux AMI host is missing a security update.Description
During certificate verfification, OpenSSL (starting from version 1.0.1n and 1.0.2b) will attempt to find an alternative certificate chain if the first attempt to build such a chain fails. An error in the implementation of this logic can mean that an attacker could cause certain checks on untrusted certificates to be bypassed, such as the CA flag, enabling them to use a valid leaf certificate to act as a CA and 'issue' an invalid certificate.This issue will impact any application that verifies certificates including SSL/TLS/DTLS clients and SSL/TLS/DTLS servers using client authentication.
The only version of OpenSSL from the Amazon Linux AMI that is impacted by this CVE is openssl-1.0.1k-10.86.amzn1, which was published as ALAS-2015-550.
Solution
Run 'yum update openssl' to update your system. Note that you may need to run 'yum clean all' first.See Also
Plugin Details
Severity: Medium
ID: 84647
File Name: ala_ALAS-2015-564.nasl
Version: 1.7
Type: local
Agent: unix
Published: 7/13/2015
Updated: 4/18/2018
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.3
CVSS v2
Risk Factor: Medium
Base Score: 6.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Vulnerability Information
CPE: p-cpe:/a:amazon:linux:openssl-perl, p-cpe:/a:amazon:linux:openssl-static, p-cpe:/a:amazon:linux:openssl-devel, cpe:/o:amazon:linux, p-cpe:/a:amazon:linux:openssl-debuginfo, p-cpe:/a:amazon:linux:openssl
Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list
Patch Publication Date: 7/9/2015
Reference Information
CVE: CVE-2015-1793
ALAS: 2015-564