Ubuntu 6.06 LTS / 6.10 : krb5 vulnerability (USN-408-1)

2007-11-10T00:00:00
ID UBUNTU_USN-408-1.NASL
Type nessus
Reporter Ubuntu Security Notice (C) 2007-2019 Canonical, Inc. / NASL script (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2007-11-10T00:00:00

Description

The server-side portion of Kerberos' RPC library had a memory management flaw which allowed users of that library to call a function pointer located in unallocated memory. By doing specially crafted calls to the kadmind server, a remote attacker could exploit this to execute arbitrary code with root privileges on the target computer.

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.

                                        
                                            #%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-408-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

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

if (description)
{
  script_id(27996);
  script_version("1.16");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2006-6143");
  script_bugtraq_id(21970);
  script_xref(name:"USN", value:"408-1");

  script_name(english:"Ubuntu 6.06 LTS / 6.10 : krb5 vulnerability (USN-408-1)");
  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:
"The server-side portion of Kerberos' RPC library had a memory
management flaw which allowed users of that library to call a function
pointer located in unallocated memory. By doing specially crafted
calls to the kadmind server, a remote attacker could exploit this to
execute arbitrary code with root privileges on the target computer.

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/408-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/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_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-clients");
  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-ftpd");
  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-rsh-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:krb5-telnetd");
  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:libkadm55");
  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:libkrb53");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:6.06:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:6.10");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/01/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/11/10");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2007-2019 Canonical, Inc. / NASL script (C) 2018 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 (! ereg(pattern:"^(6\.06|6\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 6.06 / 6.10", "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:"6.06", pkgname:"krb5-admin-server", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"krb5-clients", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"krb5-doc", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"krb5-ftpd", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"krb5-kdc", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"krb5-rsh-server", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"krb5-telnetd", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"krb5-user", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"libkadm55", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"libkrb5-dev", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"libkrb53", pkgver:"1.4.3-5ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"krb5-admin-server", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"krb5-clients", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"krb5-doc", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"krb5-ftpd", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"krb5-kdc", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"krb5-rsh-server", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"krb5-telnetd", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"krb5-user", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"libkadm55", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"libkrb5-dbg", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"libkrb5-dev", pkgver:"1.4.3-9ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"libkrb53", pkgver:"1.4.3-9ubuntu1.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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-clients / krb5-doc / krb5-ftpd / krb5-kdc / etc");
}