Ubuntu 10.04 LTS : krb5 vulnerability (USN-940-2)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-940-2. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(47799);
  script_version("1.15");
  script_cvs_date("Date: 2019/09/19 12:54:26");

  script_cve_id("CVE-2010-1320", "CVE-2010-1321");
  script_bugtraq_id(40235);
  script_xref(name:"USN", value:"940-2");

  script_name(english:"Ubuntu 10.04 LTS : krb5 vulnerability (USN-940-2)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"USN-940-1 fixed vulnerabilities in Kerberos. This update provides the
corresponding updates for Ubuntu 10.04.

Joel Johnson, Brian Almeida, and Shawn Emery discovered that Kerberos
did not correctly verify certain packet structures. An unauthenticated
remote attacker could send specially crafted traffic to cause the KDC
or kadmind services to crash, leading to a denial of service.
(CVE-2010-1320, CVE-2010-1321).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://usn.ubuntu.com/940-2/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:krb5-admin-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:krb5-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:krb5-kdc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:krb5-kdc-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:krb5-multidev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:krb5-pkinit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:krb5-user");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgssapi-krb5-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgssrpc4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libk5crypto3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkadm5clnt-mit7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkadm5srv-mit7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkdb5-4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkrb5-3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkrb5-dbg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkrb5-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkrb5support0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.04:-:lts");

  script_set_attribute(attribute:"vuln_publication_date", value:"2010/04/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2010/07/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/07/22");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2010-2019 Canonical, Inc. / NASL script (C) 2010-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(10\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 10.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

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

flag = 0;

if (ubuntu_check(osver:"10.04", pkgname:"krb5-admin-server", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"krb5-doc", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"krb5-kdc", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"krb5-kdc-ldap", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"krb5-multidev", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"krb5-pkinit", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"krb5-user", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libgssapi-krb5-2", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libgssrpc4", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libk5crypto3", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libkadm5clnt-mit7", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libkadm5srv-mit7", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libkdb5-4", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libkrb5-3", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libkrb5-dbg", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libkrb5-dev", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"libkrb5support0", pkgver:"1.8.1+dfsg-2ubuntu0.2")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "krb5-admin-server / krb5-doc / krb5-kdc / krb5-kdc-ldap / etc");
}