Vulnerabilities > CVE-2015-9267 - Improper Privilege Management vulnerability in multiple products

047910
CVSS 5.5 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
NONE
Integrity impact
HIGH
Availability impact
NONE
local
low complexity
nullsoft
debian
CWE-269
nessus
NVD
Published: 2018-10-01
Updated: 2024-11-21

Summary

Nullsoft Scriptable Install System (NSIS) before 2.49 uses temporary folder locations that allow unprivileged local users to overwrite files. This allows a local attack in which either a plugin or the uninstaller can be replaced by a Trojan horse program.

Vulnerable Configurations

Part Description Count
Application
Nullsoft
66
OS
Debian
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.

Nessus

NASL familyDebian Local Security Checks
NASL idDEBIAN_DLA-1602.NASL
descriptionAmong others, Andre Heinicke from gpg4win.org found several issues of nsis, a tool for creating quick and user friendly installers for Microsoft Windows operating systems. The issues are fixed by ... ... using SetDefaultDllDirectories() to restrict implicitly loaded and dynamically loaded modules to trusted directories ... creating temporary directories in a way that only elevated users can write into it ... not implicitly linking against Version.dll but using wrapper functions For Debian 8
last seen2020-06-01
modified2020-06-02
plugin id119312
published2018-12-01
reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/119312
titleDebian DLA-1602-1 : nsis security update
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1602-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(119312);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/18");

  script_cve_id("CVE-2015-9267", "CVE-2015-9268");

  script_name(english:"Debian DLA-1602-1 : nsis security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"Among others, Andre Heinicke from gpg4win.org found several issues of
nsis, a tool for creating quick and user friendly installers for

Microsoft Windows operating systems.

The issues are fixed by ... ... using SetDefaultDllDirectories() to
restrict implicitly loaded and dynamically loaded modules to trusted
directories ... creating temporary directories in a way that only
elevated users can write into it ... not implicitly linking against
Version.dll but using wrapper functions

For Debian 8 'Jessie', these problems have been fixed in version
2.46-10+deb8u1.

We recommend that you upgrade your nsis packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA 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://lists.debian.org/debian-lts-announce/2018/11/msg00041.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/nsis"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade 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_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nsis");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nsis-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nsis-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:nsis-pluginapi");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/10/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/11/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/01");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"nsis", reference:"2.46-10+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"nsis-common", reference:"2.46-10+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"nsis-doc", reference:"2.46-10+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"nsis-pluginapi", reference:"2.46-10+deb8u1")) flag++;

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

References