Improper fetch cleanup sequencing in the resolver can cause named to crash :
A use-after-free flaw leading to denial of service was found in the way BIND internally handled cleanup operations on upstream recursion fetch contexts. A remote attacker could potentially use this flaw to make named, acting as a DNSSEC validating resolver, exit unexpectedly with an assertion failure via a specially crafted DNS request.(CVE-2017-3145)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2018-954.
#
include("compat.inc");
if (description)
{
script_id(106931);
script_version("3.6");
script_cvs_date("Date: 2019/02/12 9:22:59");
script_cve_id("CVE-2017-3145");
script_xref(name:"ALAS", value:"2018-954");
script_name(english:"Amazon Linux AMI : bind (ALAS-2018-954)");
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:
"Improper fetch cleanup sequencing in the resolver can cause named to
crash :
A use-after-free flaw leading to denial of service was found in the
way BIND internally handled cleanup operations on upstream recursion
fetch contexts. A remote attacker could potentially use this flaw to
make named, acting as a DNSSEC validating resolver, exit unexpectedly
with an assertion failure via a specially crafted DNS
request.(CVE-2017-3145)"
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2018-954.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_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
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:"vuln_publication_date", value:"2019/01/16");
script_set_attribute(attribute:"patch_publication_date", value:"2018/02/21");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/22");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
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-9.8.2-0.62.rc1.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-chroot-9.8.2-0.62.rc1.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-debuginfo-9.8.2-0.62.rc1.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-devel-9.8.2-0.62.rc1.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-libs-9.8.2-0.62.rc1.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-sdb-9.8.2-0.62.rc1.57.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"bind-utils-9.8.2-0.62.rc1.57.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");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | bind | p-cpe:/a:amazon:linux:bind |
amazon | linux | bind-chroot | p-cpe:/a:amazon:linux:bind-chroot |
amazon | linux | bind-debuginfo | p-cpe:/a:amazon:linux:bind-debuginfo |
amazon | linux | bind-devel | p-cpe:/a:amazon:linux:bind-devel |
amazon | linux | bind-libs | p-cpe:/a:amazon:linux:bind-libs |
amazon | linux | bind-sdb | p-cpe:/a:amazon:linux:bind-sdb |
amazon | linux | bind-utils | p-cpe:/a:amazon:linux:bind-utils |
amazon | linux | cpe:/o:amazon:linux |