CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:A/AC:M/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
93.0%
ISC DHCP 4.x before 4.1-ESV-R12-P1 and 4.2.x and 4.3.x before 4.3.3-P1 allows remote attackers to cause a denial of service (application crash) via an invalid length field in a UDP IPv4 packet.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2016-637.
#
include("compat.inc");
if (description)
{
script_id(87971);
script_version("2.8");
script_cvs_date("Date: 2018/04/18 15:09:35");
script_cve_id("CVE-2015-8605");
script_xref(name:"ALAS", value:"2016-637");
script_name(english:"Amazon Linux AMI : dhcp (ALAS-2016-637)");
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:
"ISC DHCP 4.x before 4.1-ESV-R12-P1 and 4.2.x and 4.3.x before 4.3.3-P1
allows remote attackers to cause a denial of service (application
crash) via an invalid length field in a UDP IPv4 packet."
);
script_set_attribute(
attribute:"see_also",
value:"https://alas.aws.amazon.com/ALAS-2016-637.html"
);
script_set_attribute(
attribute:"solution",
value:"Run 'yum update dhcp' to update your system."
);
script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:N/C:N/I:N/A:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:A/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:dhclient");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:dhcp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:dhcp-common");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:dhcp-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:dhcp-devel");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");
script_set_attribute(attribute:"patch_publication_date", value:"2016/01/18");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/19");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2016-2018 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:"dhclient-4.1.1-43.P1.22.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"dhcp-4.1.1-43.P1.22.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"dhcp-common-4.1.1-43.P1.22.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"dhcp-debuginfo-4.1.1-43.P1.22.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"dhcp-devel-4.1.1-43.P1.22.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, "dhclient / dhcp / dhcp-common / dhcp-debuginfo / dhcp-devel");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | dhclient | p-cpe:/a:amazon:linux:dhclient |
amazon | linux | dhcp | p-cpe:/a:amazon:linux:dhcp |
amazon | linux | dhcp-common | p-cpe:/a:amazon:linux:dhcp-common |
amazon | linux | dhcp-debuginfo | p-cpe:/a:amazon:linux:dhcp-debuginfo |
amazon | linux | dhcp-devel | p-cpe:/a:amazon:linux:dhcp-devel |
amazon | linux | cpe:/o:amazon:linux |
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:A/AC:M/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
93.0%