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Amazon Linux AMI : postgresql (ALAS-2011-12)

medium Nessus Plugin ID 69571

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Synopsis

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

Description

A signedness issue was found in the way the crypt() function in the PostgreSQL pgcrypto module handled 8-bit characters in passwords when using Blowfish hashing. Up to three characters immediately preceding a non-ASCII character (one with the high bit set) had no effect on the hash result, thus shortening the effective password length. This made brute-force guessing more efficient as several different passwords were hashed to the same value. (CVE-2011-2483)

Note: Due to the CVE-2011-2483 fix, after installing this update some users may not be able to log in to applications that store user passwords, hashed with Blowfish using the PostgreSQL crypt() function, in a back-end PostgreSQL database. Unsafe processing can be re-enabled for specific passwords (allowing affected users to log in) by changing their hash prefix to '$2x$'.

Solution

Run 'yum update postgresql' to update your system.

See Also

https://alas.aws.amazon.com/ALAS-2011-12.html

Plugin Details

Severity: Medium

ID: 69571

File Name: ala_ALAS-2011-12.nasl

Version: 1.5

Type: local

Agent: unix

Published: 9/4/2013

Updated: 4/18/2018

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

Risk Information

VPR

Risk Factor: High

Score: 7.3

CVSS v2

Risk Factor: Medium

Base Score: 5

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:postgresql, p-cpe:/a:amazon:linux:postgresql-contrib, p-cpe:/a:amazon:linux:postgresql-debuginfo, p-cpe:/a:amazon:linux:postgresql-devel, p-cpe:/a:amazon:linux:postgresql-docs, p-cpe:/a:amazon:linux:postgresql-libs, p-cpe:/a:amazon:linux:postgresql-plperl, p-cpe:/a:amazon:linux:postgresql-plpython, p-cpe:/a:amazon:linux:postgresql-pltcl, p-cpe:/a:amazon:linux:postgresql-server, p-cpe:/a:amazon:linux:postgresql-test, cpe:/o:amazon:linux

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

Patch Publication Date: 10/31/2011

Reference Information

CVE: CVE-2011-2483

ALAS: 2011-12

RHSA: 2011:1377