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nessusThis script is Copyright (C) 2015-2021 Tenable Network Security, Inc.MANDRIVA_MDVSA-2015-202.NASL
HistoryApr 13, 2015 - 12:00 a.m.

Mandriva Linux Security Advisory : ntp (MDVSA-2015:202)

2015-04-1300:00:00
This script is Copyright (C) 2015-2021 Tenable Network Security, Inc.
www.tenable.com
12

Multiple vulnerabilities has been found and corrected in ntp :

The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP before 4.2.8p2 requires a correct MAC only if the MAC field has a nonzero length, which makes it easier for man-in-the-middle attackers to spoof packets by omitting the MAC (CVE-2015-1798).

The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer (CVE-2015-1799).

The updated packages provides a solution for these security issues.

#%NASL_MIN_LEVEL 70300

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandriva Linux Security Advisory MDVSA-2015:202. 
# The text itself is copyright (C) Mandriva S.A.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(82737);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2015-1798", "CVE-2015-1799");
  script_xref(name:"MDVSA", value:"2015:202");

  script_name(english:"Mandriva Linux Security Advisory : ntp (MDVSA-2015:202)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Mandriva Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Multiple vulnerabilities has been found and corrected in ntp :

The symmetric-key feature in the receive function in ntp_proto.c in
ntpd in NTP before 4.2.8p2 requires a correct MAC only if the MAC
field has a nonzero length, which makes it easier for
man-in-the-middle attackers to spoof packets by omitting the MAC
(CVE-2015-1798).

The symmetric-key feature in the receive function in ntp_proto.c in
ntpd in NTP before 4.2.8p2 performs state-variable updates upon
receiving certain invalid packets, which makes it easier for
man-in-the-middle attackers to cause a denial of service
(synchronization loss) by spoofing the source IP address of a peer
(CVE-2015-1799).

The updated packages provides a solution for these security issues."
  );
  # http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?fec88bd0"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected ntp, ntp-client and / or ntp-doc packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:N/C:N/I:P/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:ntp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:ntp-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:ntp-doc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:business_server:1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:business_server:2");

  script_set_attribute(attribute:"patch_publication_date", value:"2015/04/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/04/13");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2021 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/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);
if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"ntp-4.2.6p5-8.4.mbs1")) flag++;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"ntp-client-4.2.6p5-8.4.mbs1")) flag++;
if (rpm_check(release:"MDK-MBS1", cpu:"x86_64", reference:"ntp-doc-4.2.6p5-8.4.mbs1")) flag++;

if (rpm_check(release:"MDK-MBS2", cpu:"x86_64", reference:"ntp-4.2.6p5-16.3.mbs2")) flag++;
if (rpm_check(release:"MDK-MBS2", cpu:"x86_64", reference:"ntp-client-4.2.6p5-16.3.mbs2")) flag++;
if (rpm_check(release:"MDK-MBS2", reference:"ntp-doc-4.2.6p5-16.3.mbs2")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
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