GLSA-200904-09 : MIT Kerberos 5: Multiple vulnerabilities

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200904-09.
#
# The advisory text is Copyright (C) 2001-2016 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

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

if (description)
{
  script_id(36137);
  script_version("1.14");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2009-0844", "CVE-2009-0845", "CVE-2009-0846", "CVE-2009-0847");
  script_bugtraq_id(34257, 34408, 34409);
  script_xref(name:"GLSA", value:"200904-09");

  script_name(english:"GLSA-200904-09 : MIT Kerberos 5: Multiple vulnerabilities");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-200904-09
(MIT Kerberos 5: Multiple vulnerabilities)

    Multiple vulnerabilities have been reported in MIT Kerberos 5:
    A free() call on an uninitialized pointer in the ASN.1 decoder
    when decoding an invalid encoding (CVE-2009-0846).
    A buffer
    overread in the SPNEGO GSS-API application, reported by Apple Product
    Security (CVE-2009-0844).
    A NULL pointer dereference in the
    SPNEGO GSS-API application, reported by Richard Evans
    (CVE-2009-0845).
    An incorrect length check inside an ASN.1
    decoder leading to spurious malloc() failures (CVE-2009-0847).
  
Impact :

    A remote unauthenticated attacker could exploit the first vulnerability
    to cause a Denial of Service or, in unlikely circumstances, execute
    arbitrary code on the host running krb5kdc or kadmind with root
    privileges and compromise the Kerberos key database. Exploitation of
    the other vulnerabilities might lead to a Denial of Service in kadmind,
    krb5kdc, or other daemons performing authorization against Kerberos
    that utilize GSS-API or an information disclosure.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200904-09"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All MIT Kerberos 5 users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=app-crypt/mit-krb5-1.6.3-r6'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:ND/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20, 119, 189);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:mit-krb5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2009/04/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/04/11");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2009-2021 Tenable Network Security, Inc.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"app-crypt/mit-krb5", unaffected:make_list("ge 1.6.3-r6"), vulnerable:make_list("lt 1.6.3-r6"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "MIT Kerberos 5");
}