Vulnerabilities > CVE-2007-4135 - Local Privilege Escalation vulnerability in NFSv4 ID Mapper nfsidmap Username Lookup

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2007:0951 and 
# CentOS Errata and Security Advisory 2007:0951 respectively.
#

include("compat.inc");

if (description)
{
  script_id(43655);
  script_version("1.20");
  script_cvs_date("Date: 2019/10/25 13:36:03");

  script_cve_id("CVE-2007-3999", "CVE-2007-4135");
  script_bugtraq_id(25534);
  script_xref(name:"RHSA", value:"2007:0951");
  script_xref(name:"TRA", value:"TRA-2007-07");

  script_name(english:"CentOS 5 : nfs-utils-lib (CESA-2007:0951)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote CentOS host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An updated nfs-utils-lib package to correct two security flaws is now
available for Red Hat Enterprise Linux 5.

This update has been rated as having important security impact by the
Red Hat Security Response Team.

The nfs-utils-lib package contains support libraries that are needed
by the commands and daemons of the nfs-utils package.

The updated nfs-utils package fixes the following vulnerabilities :

Tenable Network Security discovered a stack-based buffer overflow flaw
in the RPC library used by nfs-utils-lib. A remote unauthenticated
attacker who can access an application linked against nfs-utils-lib
could trigger this flaw and cause the application to crash. On Red Hat
Enterprise Linux 5 it is not possible to exploit this flaw to run
arbitrary code as the overflow is blocked by FORTIFY_SOURCE.
(CVE-2007-3999)

Tony Ernst from SGI has discovered a flaw in the way nfsidmap maps
NFSv4 unknown uids. If an unknown user ID is encountered on an NFSv4
mounted filesystem, the files will default to being owned by 'root'
rather than 'nobody'. (CVE-2007-4135)

Users of nfs-utils-lib are advised to upgrade to this updated package,
which contains backported patches to resolve these issues."
  );
  # https://lists.centos.org/pipermail/centos-announce/2007-October/014268.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?47f2b5ee"
  );
  # https://lists.centos.org/pipermail/centos-announce/2007-October/014269.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?76b341b8"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.tenable.com/security/research/tra-2007-07"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected nfs-utils-lib packages."
  );
  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: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_cwe_id(20, 119);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:nfs-utils-lib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:nfs-utils-lib-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:5");

  script_set_attribute(attribute:"vuln_publication_date", value:"2007/09/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2007/10/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2010/01/06");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2010-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"CentOS Local Security Checks");

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

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 5.x", "CentOS " + os_ver);

if (!get_kb_item("Host/CentOS/rpm-list")) 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, "CentOS", cpu);


flag = 0;
if (rpm_check(release:"CentOS-5", reference:"nfs-utils-lib-1.0.8-7.2.z2")) flag++;
if (rpm_check(release:"CentOS-5", reference:"nfs-utils-lib-devel-1.0.8-7.2.z2")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "nfs-utils-lib / nfs-utils-lib-devel");
}

#%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandrake Linux Security Advisory MDKSA-2007:240. 
# The text itself is copyright (C) Mandriva S.A.
#

include("compat.inc");

if (description)
{
  script_id(29298);
  script_version ("1.14");
  script_cvs_date("Date: 2019/08/02 13:32:49");

  script_cve_id("CVE-2007-4135");
  script_xref(name:"MDKSA", value:"2007:240");

  script_name(english:"Mandrake Linux Security Advisory : libnfsidmap (MDKSA-2007:240)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Mandrake Linux host is missing one or more security
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The NFSv4 ID mapper prior to 0.17 did not properly handle return
values from the getpwnam_r() function when performing a username
lookup, which could cause it to report a file as being owned by 'root'
instead of 'nobody' if the file exists on the server but not the
client.

The updated packages have been patched to correct these issues."
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/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:mandriva:linux:lib64nfsidmap0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:lib64nfsidmap0-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libnfsidmap0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:libnfsidmap0-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2007");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/12/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/12/11");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2007-2019 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/rpm-list");

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK2007.0", cpu:"x86_64", reference:"lib64nfsidmap0-0.17-1.1mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", cpu:"x86_64", reference:"lib64nfsidmap0-devel-0.17-1.1mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", cpu:"i386", reference:"libnfsidmap0-0.17-1.1mdv2007.0", yank:"mdv")) flag++;
if (rpm_check(release:"MDK2007.0", cpu:"i386", reference:"libnfsidmap0-devel-0.17-1.1mdv2007.0", yank:"mdv")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");