GLSA-200410-07 : ed: Insecure temporary file handling

2004-10-09T00:00:00
ID GENTOO_GLSA-200410-07.NASL
Type nessus
Reporter This script is Copyright (C) 2004-2019 Tenable Network Security, Inc.
Modified 2019-11-02T00:00:00

Description

The remote host is affected by the vulnerability described in GLSA-200410-07 (ed: Insecure temporary file handling)

ed insecurely creates temporary files in world-writeable directories with
predictable names. Given that ed is used in various system shell scripts,
they are by extension affected by the same vulnerability.

Impact :

A local attacker could create symbolic links in the temporary files
directory, pointing to a valid file somewhere on the filesystem. When ed is
called, this would result in file access with the rights of the user
running the utility, which could be the root user.

Workaround :

There is no known workaround at this time.

                                        
                                            #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200410-07.
#
# The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(15445);
  script_version("1.14");
  script_cvs_date("Date: 2019/08/02 13:32:41");

  script_cve_id("CVE-2000-1137");
  script_xref(name:"GLSA", value:"200410-07");

  script_name(english:"GLSA-200410-07 : ed: Insecure temporary file handling");
  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-200410-07
(ed: Insecure temporary file handling)

    ed insecurely creates temporary files in world-writeable directories with
    predictable names. Given that ed is used in various system shell scripts,
    they are by extension affected by the same vulnerability.
  
Impact :

    A local attacker could create symbolic links in the temporary files
    directory, pointing to a valid file somewhere on the filesystem. When ed is
    called, this would result in file access with the rights of the user
    running the utility, which could be the root user.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200410-07"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All ed users should upgrade to the latest version:
    # emerge sync
    # emerge -pv '>=sys-apps/ed-0.2-r4'
    # emerge '>=sys-apps/ed-0.2-r4'"
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2004/10/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2004/10/09");
  script_set_attribute(attribute:"vuln_publication_date", value:"2000/12/11");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2004-2019 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:"sys-apps/ed", unaffected:make_list("ge 0.2-r4"), vulnerable:make_list("le 0.2-r3"))) flag++;

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