Vulnerabilities > CVE-2013-7048 - Permissions, Privileges, and Access Controls vulnerability in Openstack Nova

047910
CVSS 3.3 - LOW
Attack vector
LOCAL
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
NONE
local
openstack
CWE-264
nessus

Summary

OpenStack Compute (Nova) Grizzly 2013.1.4, Havana 2013.2.1, and earlier uses world-writable and world-readable permissions for the temporary directory used to store live snapshots, which allows local users to read and modify live snapshots.

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • 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.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2014-2554.NASL
    descriptionCVE-2013-7048 - Fix insecure directory permissions in snapshots Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-03-17
    modified2014-02-26
    plugin id72695
    published2014-02-26
    reporterThis script is Copyright (C) 2014-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/72695
    titleFedora 20 : openstack-nova-2013.2.2-1.fc20 (2014-2554)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory 2014-2554.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(72695);
      script_version("1.3");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");
    
      script_cve_id("CVE-2013-7048");
      script_xref(name:"FEDORA", value:"2014-2554");
    
      script_name(english:"Fedora 20 : openstack-nova-2013.2.2-1.fc20 (2014-2554)");
      script_summary(english:"Checks rpm output for the updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Fedora host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "CVE-2013-7048 - Fix insecure directory permissions in snapshots
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Fedora 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://bugzilla.redhat.com/show_bug.cgi?id=1040786"
      );
      # https://lists.fedoraproject.org/pipermail/package-announce/2014-February/129083.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?e4e41c23"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected openstack-nova package."
      );
      script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:N");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:openstack-nova");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:20");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2014/02/15");
      script_set_attribute(attribute:"plugin_publication_date", value:"2014/02/26");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2014-2020 Tenable Network Security, Inc.");
      script_family(english:"Fedora Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/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/RedHat/release");
    if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
    os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
    os_ver = os_ver[1];
    if (! ereg(pattern:"^20([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 20.x", "Fedora " + os_ver);
    
    if (!get_kb_item("Host/RedHat/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, "Fedora", cpu);
    
    flag = 0;
    if (rpm_check(release:"FC20", reference:"openstack-nova-2013.2.2-1.fc20")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
      else security_note(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openstack-nova");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2014-4188.NASL
    descriptionUpdate to stable/grizzly release 2013.1.5 - Keep XenAPI security groups through migrate and resize - CVE-2013-4497 - Secure directory permissions in snapshots - CVE-2013-7048 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-03-17
    modified2014-04-03
    plugin id73314
    published2014-04-03
    reporterThis script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/73314
    titleFedora 19 : openstack-nova-2013.1.5-1.fc19 (2014-4188)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory 2014-4188.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(73314);
      script_version("1.5");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");
    
      script_cve_id("CVE-2013-4497", "CVE-2013-7048");
      script_bugtraq_id(63543, 64266);
      script_xref(name:"FEDORA", value:"2014-4188");
    
      script_name(english:"Fedora 19 : openstack-nova-2013.1.5-1.fc19 (2014-4188)");
      script_summary(english:"Checks rpm output for the updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Fedora host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Update to stable/grizzly release 2013.1.5
    
      - Keep XenAPI security groups through migrate and resize -
        CVE-2013-4497
    
        - Secure directory permissions in snapshots -
          CVE-2013-7048
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Fedora 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://bugzilla.redhat.com/show_bug.cgi?id=1026171"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.redhat.com/show_bug.cgi?id=1040786"
      );
      # https://lists.fedoraproject.org/pipermail/package-announce/2014-April/130977.html
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?8ff2ecfc"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected openstack-nova package."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
      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:fedoraproject:fedora:openstack-nova");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:19");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2014/03/22");
      script_set_attribute(attribute:"plugin_publication_date", value:"2014/04/03");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Fedora Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/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/RedHat/release");
    if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
    os_ver = eregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
    os_ver = os_ver[1];
    if (! ereg(pattern:"^19([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 19.x", "Fedora " + os_ver);
    
    if (!get_kb_item("Host/RedHat/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, "Fedora", cpu);
    
    flag = 0;
    if (rpm_check(release:"FC19", reference:"openstack-nova-2013.1.5-1.fc19")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
      else security_warning(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openstack-nova");
    }
    

Redhat

advisories
rhsa
idRHSA-2014:0231
rpms
  • openstack-nova-0:2013.2.2-2.el6ost
  • openstack-nova-api-0:2013.2.2-2.el6ost
  • openstack-nova-cells-0:2013.2.2-2.el6ost
  • openstack-nova-cert-0:2013.2.2-2.el6ost
  • openstack-nova-common-0:2013.2.2-2.el6ost
  • openstack-nova-compute-0:2013.2.2-2.el6ost
  • openstack-nova-conductor-0:2013.2.2-2.el6ost
  • openstack-nova-console-0:2013.2.2-2.el6ost
  • openstack-nova-doc-0:2013.2.2-2.el6ost
  • openstack-nova-network-0:2013.2.2-2.el6ost
  • openstack-nova-novncproxy-0:2013.2.2-2.el6ost
  • openstack-nova-objectstore-0:2013.2.2-2.el6ost
  • openstack-nova-scheduler-0:2013.2.2-2.el6ost
  • python-nova-0:2013.2.2-2.el6ost
  • openstack-nova-0:2013.1.5-2.el6ost
  • openstack-nova-api-0:2013.1.5-2.el6ost
  • openstack-nova-cells-0:2013.1.5-2.el6ost
  • openstack-nova-cert-0:2013.1.5-2.el6ost
  • openstack-nova-common-0:2013.1.5-2.el6ost
  • openstack-nova-compute-0:2013.1.5-2.el6ost
  • openstack-nova-conductor-0:2013.1.5-2.el6ost
  • openstack-nova-console-0:2013.1.5-2.el6ost
  • openstack-nova-doc-0:2013.1.5-2.el6ost
  • openstack-nova-network-0:2013.1.5-2.el6ost
  • openstack-nova-objectstore-0:2013.1.5-2.el6ost
  • openstack-nova-scheduler-0:2013.1.5-2.el6ost
  • python-nova-0:2013.1.5-2.el6ost

Seebug

bulletinFamilyexploit
descriptionBUGTRAQ ID: 64266 CVE(CAN) ID: CVE-2013-7048 OpenStack Compute (Nova)是用Python编写的云计算构造控制器,属于laaS系统的一部分。 OpenStack Compute (Nova) Havana、Grizzly在实现上存在不安全目录权限导致的安全漏洞,攻击者可利用此漏洞在受影响目录内执行未授权操作。 0 openstack Nova 厂商补丁: openstack --------- 目前厂商已经发布了升级补丁以修复这个安全问题,请到厂商的主页下载: http://lists.openstack.org/pipermail/openstack-announce/
idSSV:61108
last seen2017-11-19
modified2013-12-13
published2013-12-13
reporterRoot
titleOpenStack Compute (Nova) 不安全目录权限漏洞