RedHat Update for dhcp RHSA-2016:2590-02

# SPDX-FileCopyrightText: 2016 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.871705");
  script_version("2024-03-21T05:06:54+0000");
  script_tag(name:"last_modification", value:"2024-03-21 05:06:54 +0000 (Thu, 21 Mar 2024)");
  script_tag(name:"creation_date", value:"2016-11-04 05:42:47 +0100 (Fri, 04 Nov 2016)");
  script_cve_id("CVE-2016-2774");
  script_tag(name:"cvss_base", value:"7.1");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-01-08 17:17:00 +0000 (Wed, 08 Jan 2020)");
  script_tag(name:"qod_type", value:"package");
  script_name("RedHat Update for dhcp RHSA-2016:2590-02");
  script_tag(name:"summary", value:"The remote host is missing an update for the 'dhcp'
  package(s) announced via the referenced advisory.");
  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
  script_tag(name:"insight", value:"The Dynamic Host Configuration Protocol
(DHCP) is a protocol that allows individual devices on an IP network to get their
own network configuration information, including an IP address, a subnet mask,
and a broadcast address. The dhcp packages provide a relay agent and ISC DHCP
service required to enable and administer DHCP on a network.

Security Fix(es):

  * A resource-consumption flaw was discovered in the DHCP server. dhcpd did
not restrict the number of open connections to OMAPI and failover ports. A
remote attacker able to establish TCP connections to one of these ports
could use this flaw to cause dhcpd to exit unexpectedly, stop responding
requests, or exhaust system sockets (denial of service). (CVE-2016-2774)

Red Hat would like to thank ISC for reporting this issue.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.3 Release Notes linked from the References section.");
  script_tag(name:"affected", value:"dhcp on Red Hat Enterprise Linux Server (v. 7)");
  script_tag(name:"solution", value:"Please Install the Updated Packages.");

  script_xref(name:"RHSA", value:"2016:2590-02");
  script_xref(name:"URL", value:"https://www.redhat.com/archives/rhsa-announce/2016-November/msg00026.html");
  script_tag(name:"solution_type", value:"VendorFix");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("Red Hat Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/rhel", "ssh/login/rpms", re:"ssh/login/release=RHENT_7");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-rpm.inc");

release = rpm_get_ssh_release();
if(!release) exit(0);

res = "";

if(release == "RHENT_7")
{

  if ((res = isrpmvuln(pkg:"dhclient", rpm:"dhclient~4.2.5~47.el7", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"dhcp", rpm:"dhcp~4.2.5~47.el7", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"dhcp-common", rpm:"dhcp-common~4.2.5~47.el7", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"dhcp-debuginfo", rpm:"dhcp-debuginfo~4.2.5~47.el7", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if ((res = isrpmvuln(pkg:"dhcp-libs", rpm:"dhcp-libs~4.2.5~47.el7", rls:"RHENT_7")) != NULL)
  {
    security_message(data:res);
    exit(0);
  }

  if (__pkg_match) exit(99);
  exit(0);
}