CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:N/I:N/A:C
EPSS
Percentile
99.4%
An error in the parsing of incoming responses allows some records with an incorrect class to be be accepted by BIND instead of being rejected as malformed. This can trigger a REQUIRE assertion failure when those records are subsequently cached. Intentional exploitation of this condition is possible and could be used as a denial-of-service vector against servers performing recursive queries. (CVE-2015-8000)
CVE-2015-8461 was also issued today for bind, but the Amazon Linux AMI’s version of bind is not impacted by that CVE.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2015-631.
#
include("compat.inc");
if (description)
{
script_id(87380);
script_version("2.6");
script_cvs_date("Date: 2018/04/18 15:09:35");
script_cve_id("CVE-2015-8000");
script_xref(name:"ALAS", value:"2015-631");
script_xref(name:"RHSA", value:"2015:2655");
script_name(english:"Amazon Linux AMI : bind (ALAS-2015-631)");
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:
"An error in the parsing of incoming responses allows some records with
an incorrect class to be be accepted by BIND instead of being rejected
as malformed. This can trigger a REQUIRE assertion failure when those
records are subsequently cached. Intentional exploitation of this
condition is possible and could be used as a denial-of-service vector
against servers performing recursive queries. (CVE-2015-8000)
CVE-2015-8461 was also issued today for bind, but the Amazon Linux
AMI's version of bind is not impacted by that CVE."
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2015-631.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update bind' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bind");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bind-chroot");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bind-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bind-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bind-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bind-sdb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bind-utils");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2015/12/15");
script_set_attribute(attribute:"plugin_publication_date", value:"2015/12/16");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2015-2018 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:"bind-9.8.2-0.37.rc1.42.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-chroot-9.8.2-0.37.rc1.42.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-debuginfo-9.8.2-0.37.rc1.42.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-devel-9.8.2-0.37.rc1.42.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-libs-9.8.2-0.37.rc1.42.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-sdb-9.8.2-0.37.rc1.42.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-utils-9.8.2-0.37.rc1.42.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, "bind / bind-chroot / bind-debuginfo / bind-devel / bind-libs / etc");
}