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nessusThis script is Copyright (C) 2013-2021 and is owned by Tenable, Inc. or an Affiliate thereof.SL_20130930_XINETD_ON_SL5_X.NASL
HistoryOct 10, 2013 - 12:00 a.m.

Scientific Linux Security Update : xinetd on SL5.x i386/x86_64 (20130930)

2013-10-1000:00:00
This script is Copyright (C) 2013-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
10

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS

0.005

Percentile

75.4%

When xinetd services are configured with the ‘TCPMUX’ or ‘TCPMUXPLUS’ type, and the tcpmux-server service is enabled, those services are accessible via port 1. It was found that enabling the tcpmux-server service (it is disabled by default) allowed every xinetd service, including those that are not configured with the ‘TCPMUX’ or ‘TCPMUXPLUS’ type, to be accessible via port 1. This could allow a remote attacker to bypass intended firewall restrictions.
(CVE-2012-0862)

This update also fixes the following bugs :

  • Prior to this update, a file descriptor array in the service.c source file was not handled as expected. As a consequence, some of the descriptors remained open when xinetd was under heavy load. Additionally, the system log was filled with a large number of messages that took up a lot of disk space over time. This update modifies the xinetd code to handle the file descriptors correctly and messages no longer fill the system log.

  • Prior to this update, services were disabled permanently when their CPS limit was reached. As a consequence, a failed bind operation could occur when xinetd attempted to restart the service. This update adds additional logic that attempts to restart the service. Now, the service is only disabled if xinetd cannot restart the service after 30 attempts.

#%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(70364);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");

  script_cve_id("CVE-2012-0862");

  script_name(english:"Scientific Linux Security Update : xinetd on SL5.x i386/x86_64 (20130930)");
  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:
"When xinetd services are configured with the 'TCPMUX' or 'TCPMUXPLUS'
type, and the tcpmux-server service is enabled, those services are
accessible via port 1. It was found that enabling the tcpmux-server
service (it is disabled by default) allowed every xinetd service,
including those that are not configured with the 'TCPMUX' or
'TCPMUXPLUS' type, to be accessible via port 1. This could allow a
remote attacker to bypass intended firewall restrictions.
(CVE-2012-0862)

This update also fixes the following bugs :

  - Prior to this update, a file descriptor array in the
    service.c source file was not handled as expected. As a
    consequence, some of the descriptors remained open when
    xinetd was under heavy load. Additionally, the system
    log was filled with a large number of messages that took
    up a lot of disk space over time. This update modifies
    the xinetd code to handle the file descriptors correctly
    and messages no longer fill the system log.

  - Prior to this update, services were disabled permanently
    when their CPS limit was reached. As a consequence, a
    failed bind operation could occur when xinetd attempted
    to restart the service. This update adds additional
    logic that attempts to restart the service. Now, the
    service is only disabled if xinetd cannot restart the
    service after 30 attempts."
  );
  # https://listserv.fnal.gov/scripts/wa.exe?A2=ind1310&L=scientific-linux-errata&T=0&P=439
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?748b03fa"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected xinetd and / or xinetd-debuginfo packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:xinetd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:xinetd-debuginfo");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/06/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/09/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/10/10");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2021 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:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 5.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:"SL5", reference:"xinetd-2.3.14-19.el5")) flag++;
if (rpm_check(release:"SL5", reference:"xinetd-debuginfo-2.3.14-19.el5")) 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, "xinetd / xinetd-debuginfo");
}
VendorProductVersionCPE
fermilabscientific_linuxxinetdp-cpe:/a:fermilab:scientific_linux:xinetd
fermilabscientific_linuxxinetd-debuginfop-cpe:/a:fermilab:scientific_linux:xinetd-debuginfo
fermilabscientific_linuxx-cpe:/o:fermilab:scientific_linux

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS

0.005

Percentile

75.4%