Scientific Linux Security Update : ntp on SL7.x x86_64 (20161103)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#

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

if (description)
{
  script_id(95850);
  script_version("3.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2014-9750", "CVE-2015-5194", "CVE-2015-5195", "CVE-2015-5196", "CVE-2015-5219", "CVE-2015-7691", "CVE-2015-7692", "CVE-2015-7701", "CVE-2015-7702", "CVE-2015-7703", "CVE-2015-7852", "CVE-2015-7974", "CVE-2015-7977", "CVE-2015-7978", "CVE-2015-7979", "CVE-2015-8158");
  script_xref(name:"TRA", value:"TRA-2015-04");

  script_name(english:"Scientific Linux Security Update : ntp on SL7.x x86_64 (20161103)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis",
    value:
"The remote Scientific Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description",
    value:
"Security Fix(es) :

  - It was found that the fix for CVE-2014-9750 was
    incomplete: three issues were found in the value length
    checks in NTP's ntp_crypto.c, where a packet with
    particular autokey operations that contained malicious
    data was not always being completely validated. A remote
    attacker could use a specially crafted NTP packet to
    crash ntpd. (CVE-2015-7691, CVE-2015-7692,
    CVE-2015-7702)

  - A memory leak flaw was found in ntpd's CRYPTO_ASSOC. If
    ntpd was configured to use autokey authentication, an
    attacker could send packets to ntpd that would, after
    several days of ongoing attack, cause it to run out of
    memory. (CVE-2015-7701)

  - An off-by-one flaw, leading to a buffer overflow, was
    found in cookedprint functionality of ntpq. A specially
    crafted NTP packet could potentially cause ntpq to
    crash. (CVE-2015-7852)

  - A NULL pointer dereference flaw was found in the way
    ntpd processed 'ntpdc reslist' commands that queried
    restriction lists with a large amount of entries. A
    remote attacker could potentially use this flaw to crash
    ntpd. (CVE-2015-7977)

  - A stack-based buffer overflow flaw was found in the way
    ntpd processed 'ntpdc reslist' commands that queried
    restriction lists with a large amount of entries. A
    remote attacker could use this flaw to crash ntpd.
    (CVE-2015-7978)

  - It was found that when NTP was configured in broadcast
    mode, a remote attacker could broadcast packets with bad
    authentication to all clients. The clients, upon
    receiving the malformed packets, would break the
    association with the broadcast server, causing them to
    become out of sync over a longer period of time.
    (CVE-2015-7979)

  - It was found that ntpd could crash due to an
    uninitialized variable when processing malformed
    logconfig configuration commands. (CVE-2015-5194)

  - It was found that ntpd would exit with a segmentation
    fault when a statistics type that was not enabled during
    compilation (e.g. timingstats) was referenced by the
    statistics or filegen configuration command.
    (CVE-2015-5195)

  - It was found that NTP's :config command could be used to
    set the pidfile and driftfile paths without any
    restrictions. A remote attacker could use this flaw to
    overwrite a file on the file system with a file
    containing the pid of the ntpd process (immediately) or
    the current estimated drift of the system clock (in
    hourly intervals). (CVE-2015-5196, CVE-2015-7703)

  - It was discovered that the sntp utility could become
    unresponsive due to being caught in an infinite loop
    when processing a crafted NTP packet. (CVE-2015-5219)

  - A flaw was found in the way NTP verified trusted keys
    during symmetric key authentication. An authenticated
    client (A) could use this flaw to modify a packet sent
    between a server (B) and a client (C) using a key that
    is different from the one known to the client (A).
    (CVE-2015-7974)

  - A flaw was found in the way the ntpq client processed
    certain incoming packets in a loop in the getresponse()
    function. A remote attacker could potentially use this
    flaw to crash an ntpq client instance. (CVE-2015-8158)

The CVE-2015-5219 and CVE-2015-7703 issues were discovered by Miroslav
Lichvr (Red Hat).

Additional Changes :"
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1612&L=scientific-linux-errata&F=&S=&P=12188
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?f5db535f"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.tenable.com/security/research/tra-2015-04"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ntp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ntp-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ntp-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ntp-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:ntpdate");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:sntp");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/10/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/11/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Scientific Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 7.x", "Scientific Linux " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);


flag = 0;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"ntp-4.2.6p5-25.el7")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"ntp-debuginfo-4.2.6p5-25.el7")) flag++;
if (rpm_check(release:"SL7", reference:"ntp-doc-4.2.6p5-25.el7")) flag++;
if (rpm_check(release:"SL7", reference:"ntp-perl-4.2.6p5-25.el7")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"ntpdate-4.2.6p5-25.el7")) flag++;
if (rpm_check(release:"SL7", cpu:"x86_64", reference:"sntp-4.2.6p5-25.el7")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ntp / ntp-debuginfo / ntp-doc / ntp-perl / ntpdate / sntp");
}