Ubuntu 4.10 : samba vulnerability (USN-29-1)

2006-01-15T00:00:00
ID UBUNTU_USN-29-1.NASL
Type nessus
Reporter Tenable
Modified 2016-05-25T00:00:00

Description

During an audit of the Samba 3.x code base Stefan Esser discovered a Unicode file name buffer overflow within the handling of TRANSACT2_QFILEPATHINFO replies. A malicious samba user with write access to a share could exploit this by creating specially crafted path names (files with very long names containing Unicode characters) that would overflow an internal buffer and could lead to remote execution of arbitrary code with the privileges of the samba server.

Since the samba server usually (by default) runs as root, this flaw can lead to privilege escalation and unbounded system compromise.

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.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-29-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(20644);
  script_version("$Revision: 1.12 $");
  script_cvs_date("$Date: 2016/05/25 16:34:55 $");

  script_cve_id("CVE-2004-0882");
  script_xref(name:"USN", value:"29-1");

  script_name(english:"Ubuntu 4.10 : samba vulnerability (USN-29-1)");
  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:
"During an audit of the Samba 3.x code base Stefan Esser discovered a
Unicode file name buffer overflow within the handling of
TRANSACT2_QFILEPATHINFO replies. A malicious samba user with write
access to a share could exploit this by creating specially crafted
path names (files with very long names containing Unicode characters)
that would overflow an internal buffer and could lead to remote
execution of arbitrary code with the privileges of the samba server.

Since the samba server usually (by default) runs as root, this flaw
can lead to privilege escalation and unbounded system compromise.

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:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpam-smbpass");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libsmbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libsmbclient-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python2.3-samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:smbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:smbfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:swat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:winbind");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:4.10");

  script_set_attribute(attribute:"patch_publication_date", value:"2004/11/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/01/15");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2004-2016 Canonical, Inc. / NASL script (C) 2006-2016 Tenable Network Security, Inc.");
  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:"^(4\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 4.10", "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:"4.10", pkgname:"libpam-smbpass", pkgver:"3.0.7-1ubuntu6.2")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"libsmbclient", pkgver:"3.0.7-1ubuntu6.2")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"libsmbclient-dev", pkgver:"3.0.7-1ubuntu6.2")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"python2.3-samba", pkgver:"3.0.7-1ubuntu6.2")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"samba", pkgver:"3.0.7-1ubuntu6.2")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"samba-common", pkgver:"3.0.7-1ubuntu6.2")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"samba-doc", pkgver:"3.0.7-1ubuntu6.2")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"smbclient", pkgver:"3.0.7-1ubuntu6.2")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"smbfs", pkgver:"3.0.7-1ubuntu6.2")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"swat", pkgver:"3.0.7-1ubuntu6.2")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"winbind", pkgver:"3.0.7-1ubuntu6.2")) 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, "libpam-smbpass / libsmbclient / libsmbclient-dev / python2.3-samba / etc");
}