Lucene search

K
nessus
This script is Copyright (C) 2013-2018 Tenable Network Security, Inc.ALA_ALAS-2011-12.NASL
HistorySep 04, 2013 - 12:00 a.m.

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

2013-09-0400:00:00
This script is Copyright (C) 2013-2018 Tenable Network Security, Inc.
www.tenable.com
16

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 ‘$2x$’.

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2011-12.
#

include("compat.inc");

if (description)
{
  script_id(69571);
  script_version("1.5");
  script_cvs_date("Date: 2018/04/18 15:09:34");

  script_cve_id("CVE-2011-2483");
  script_xref(name:"ALAS", value:"2011-12");
  script_xref(name:"RHSA", value:"2011:1377");

  script_name(english:"Amazon Linux AMI : postgresql (ALAS-2011-12)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Amazon Linux AMI host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"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 '$2x$'."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/ALAS-2011-12.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Run 'yum update postgresql' to update your system."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql-contrib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql-docs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql-plperl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql-plpython");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql-pltcl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql-test");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/10/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/09/04");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2018 Tenable Network Security, Inc.");
  script_family(english:"Amazon Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

release = get_kb_item("Host/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (rpm_check(release:"ALA", reference:"postgresql-8.4.9-1.13.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql-contrib-8.4.9-1.13.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql-debuginfo-8.4.9-1.13.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql-devel-8.4.9-1.13.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql-docs-8.4.9-1.13.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql-libs-8.4.9-1.13.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql-plperl-8.4.9-1.13.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql-plpython-8.4.9-1.13.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql-pltcl-8.4.9-1.13.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql-server-8.4.9-1.13.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql-test-8.4.9-1.13.amzn1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "postgresql / postgresql-contrib / postgresql-debuginfo / etc");
}
How to find holes in your network?

Try incredible fast Vulners Perimeter Scanner and find vulnerabilities and unnecessary ip and ports in network devices inside your network before anyone else.

Try Network Scanner
Related for ALA_ALAS-2011-12.NASL