pg_user_mappings view discloses passwords to users lacking server privileges :
An authorization flaw was found in the way PostgreSQL handled access to the pg_user_mappings view on foreign servers. A remote authenticated attacker could potentially use this flaw to retrieve passwords from the user mappings defined by the foreign server owners without actually having the privileges to do so. (CVE-2017-7547)
Empty password accepted in some authentication methods :
It was found that authenticating to a PostgreSQL database account with an empty password was possible despite libpq’s refusal to send an empty password. A remote attacker could potentially use this flaw to gain access to database accounts with empty passwords. (CVE-2017-7546)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2017-884.
#
include("compat.inc");
if (description)
{
script_id(102872);
script_version("3.5");
script_cvs_date("Date: 2018/04/18 15:09:36");
script_cve_id("CVE-2017-7546", "CVE-2017-7547");
script_xref(name:"ALAS", value:"2017-884");
script_name(english:"Amazon Linux AMI : postgresql93 / postgresql92 (ALAS-2017-884)");
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:
"pg_user_mappings view discloses passwords to users lacking server
privileges :
An authorization flaw was found in the way PostgreSQL handled access
to the pg_user_mappings view on foreign servers. A remote
authenticated attacker could potentially use this flaw to retrieve
passwords from the user mappings defined by the foreign server owners
without actually having the privileges to do so. (CVE-2017-7547)
Empty password accepted in some authentication methods :
It was found that authenticating to a PostgreSQL database account with
an empty password was possible despite libpq's refusal to send an
empty password. A remote attacker could potentially use this flaw to
gain access to database accounts with empty passwords. (CVE-2017-7546)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2017-884.html"
);
script_set_attribute(
attribute:"solution",
value:
"Run 'yum update postgresql93' to update your system.
Run 'yum update postgresql92' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-contrib");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-docs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-plperl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-plpython26");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-plpython27");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-pltcl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-server");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-server-compat");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql92-test");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-contrib");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-docs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-plperl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-plpython26");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-plpython27");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-pltcl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-server");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:postgresql93-test");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2017/08/31");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/01");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2017-2018 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:"postgresql92-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-contrib-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-debuginfo-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-devel-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-docs-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-libs-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-plperl-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-plpython26-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-plpython27-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-pltcl-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-server-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-server-compat-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql92-test-9.2.22-1.61.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-contrib-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-debuginfo-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-devel-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-docs-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-libs-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-plperl-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-plpython26-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-plpython27-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-pltcl-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-server-9.3.18-1.64.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"postgresql93-test-9.3.18-1.64.amzn1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
else security_hole(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "postgresql92 / postgresql92-contrib / postgresql92-debuginfo / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | postgresql92 | p-cpe:/a:amazon:linux:postgresql92 |
amazon | linux | postgresql92-contrib | p-cpe:/a:amazon:linux:postgresql92-contrib |
amazon | linux | postgresql92-debuginfo | p-cpe:/a:amazon:linux:postgresql92-debuginfo |
amazon | linux | postgresql92-devel | p-cpe:/a:amazon:linux:postgresql92-devel |
amazon | linux | postgresql92-docs | p-cpe:/a:amazon:linux:postgresql92-docs |
amazon | linux | postgresql92-libs | p-cpe:/a:amazon:linux:postgresql92-libs |
amazon | linux | postgresql92-plperl | p-cpe:/a:amazon:linux:postgresql92-plperl |
amazon | linux | postgresql92-plpython26 | p-cpe:/a:amazon:linux:postgresql92-plpython26 |
amazon | linux | postgresql92-plpython27 | p-cpe:/a:amazon:linux:postgresql92-plpython27 |
amazon | linux | postgresql92-pltcl | p-cpe:/a:amazon:linux:postgresql92-pltcl |