Vulnerabilities > CVE-2017-7538 - Cross-site Scripting vulnerability in Redhat Satellite

047910
CVSS 5.4 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
LOW
Integrity impact
LOW
Availability impact
NONE
network
low complexity
redhat
CWE-79
nessus

Summary

A cross-site scripting (XSS) flaw was found in how an organization name is displayed in Satellite 5, before 5.8. A user able to change an organization's name could exploit this flaw to perform XSS attacks against other Satellite users.

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Embedding Scripts in Non-Script Elements
    This attack is a form of Cross-Site Scripting (XSS) where malicious scripts are embedded in elements that are not expected to host scripts such as image tags (<img>), comments in XML documents (< !-CDATA->), etc. These tags may not be subject to the same input validation, output validation, and other content filtering and checking routines, so this can create an opportunity for an attacker to tunnel through the application's elements and launch a XSS attack through other elements. As with all remote attacks, it is important to differentiate the ability to launch an attack (such as probing an internal network for unpatched servers) and the ability of the remote attacker to collect and interpret the output of said attack.
  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Cross-Site Scripting in Error Pages
    An attacker distributes a link (or possibly some other query structure) with a request to a third party web server that is malformed and also contains a block of exploit code in order to have the exploit become live code in the resulting error page. When the third party web server receives the crafted request and notes the error it then creates an error message that echoes the malformed message, including the exploit. Doing this converts the exploit portion of the message into to valid language elements that are executed by the viewing browser. When a victim executes the query provided by the attacker the infected error message error message is returned including the exploit code which then runs in the victim's browser. XSS can result in execution of code as well as data leakage (e.g. session cookies can be sent to the attacker). This type of attack is especially dangerous since the exploit appears to come from the third party web server, who the victim may trust and hence be more vulnerable to deception.
  • Cross-Site Scripting Using Alternate Syntax
    The attacker uses alternate forms of keywords or commands that result in the same action as the primary form but which may not be caught by filters. For example, many keywords are processed in a case insensitive manner. If the site's web filtering algorithm does not convert all tags into a consistent case before the comparison with forbidden keywords it is possible to bypass filters (e.g., incomplete black lists) by using an alternate case structure. For example, the "script" tag using the alternate forms of "Script" or "ScRiPt" may bypass filters where "script" is the only form tested. Other variants using different syntax representations are also possible as well as using pollution meta-characters or entities that are eventually ignored by the rendering engine. The attack can result in the execution of otherwise prohibited functionality.

Nessus

NASL familyRed Hat Local Security Checks
NASL idREDHAT-RHSA-2017-2645.NASL
descriptionAn update for satellite-schema, spacewalk-backend, spacewalk-java, and spacewalk-schema is now available for Red Hat Satellite 5.8 and Red Hat Satellite 5.8 ELS. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Spacewalk is an Open Source systems management solution that provides system provisioning, configuration and patching capabilities. Red Hat Satellite is a system management tool for Linux-based infrastructures. It allows for provisioning, monitoring, and the remote management of multiple Linux deployments with a single, centralized tool. Security Fix(es) : * A cross-site scripting (XSS) flaw was found in how an organization name is displayed in Satellite 5. A user able to change an organization
last seen2020-06-01
modified2020-06-02
plugin id103045
published2017-09-08
reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/103045
titleRHEL 6 : Satellite Server (RHSA-2017:2645)
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2017:2645. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(103045);
  script_version("3.10");
  script_cvs_date("Date: 2019/10/24 15:35:43");

  script_cve_id("CVE-2017-7538");
  script_xref(name:"RHSA", value:"2017:2645");

  script_name(english:"RHEL 6 : Satellite Server (RHSA-2017:2645)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An update for satellite-schema, spacewalk-backend, spacewalk-java, and
spacewalk-schema is now available for Red Hat Satellite 5.8 and Red
Hat Satellite 5.8 ELS.

Red Hat Product Security has rated this update as having a security
impact of Moderate. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

Spacewalk is an Open Source systems management solution that provides
system provisioning, configuration and patching capabilities.

Red Hat Satellite is a system management tool for Linux-based
infrastructures. It allows for provisioning, monitoring, and the
remote management of multiple Linux deployments with a single,
centralized tool.

Security Fix(es) :

* A cross-site scripting (XSS) flaw was found in how an organization
name is displayed in Satellite 5. A user able to change an
organization's name could exploit this flaw to perform XSS attacks
against other Satellite users. (CVE-2017-7538)

This issue was discovered by Ales Dujicek (Red Hat).

Bug Fix(es) :

* Prior to this update, transferring content between Satellites using
Inter-Satellite Synchronization or channel-dumps failed to transfer
the product-name related to channels. This interfered with the process
of moving a server between EUS channels. The 'satellite-export' tool
now correctly provides associated product-names, fixing this behavior.
(BZ# 1446271)

* Prior to this update, the API call 'schedule.failSystemAction()'
allowed overwriting a system's event history. This is undesirable from
an auditing standpoint. The API now no longer allows affecting
completed or failed events. (BZ#1455887)

* Prior to this update, organization administrators who were not
allowed to change their organization's attributes could do so by
modifying form elements. The associated form controller no longer
allows this behavior. (BZ#1458722)

* Prior to this update, the 'download' tool's retry limit would be
incorrect if there were more available mirrors than its retry count.
It could also produce a harmless but unhelpful traceback in some
situations. Both of these behaviors have been fixed. (BZ#1458765)

* Prior to this update, it was possible for parallel registrations
using reactivation keys, that were creating snapshot entries, to
occasionally deadlock. Both the reactivation-key registration and
snapshot-creation paths have been updated to prevent these deadlocks.
(BZ#1458880)

* Prior to this update, if there was some problem with a single
erratum in a given repository, the 'reposync' command would complain
and exit. The tool now logs such errors but continues to synchronize
any remaining errata. (BZ #1466229)

* The Satellite 5.8 release failed to include an update to a
registration-failure error message that had been released for
Satellite 5.7. This restores the missing update. (BZ#1467632)

* Prior to this update, the list of systems in the System Set Manager
failed to display the correct icons for a system's update status. This
has been corrected. (BZ#1475067)

* Prior to this update, a timing window in the 'cdn-sync' command,
when synchronizing multiple channels at once, could cause some of the
synchronization attempts to be refused with a 403 error. This update
fixes the timing window so that multiple syncs should now work
reliably. (BZ# 1476924)

* Prior to this update, attempting to view the systems in the System
Set Manager that are affected by a given erratum would result in an
internal server error. This has been fixed. (BZ#1477508)

* Prior to this update, using 'cdn-sync --no-packages' on a specific
channel would disassociate all packages from that channel. This
behavior has been fixed, so that '--no-packages' now just skips that
step as intended. (BZ# 1477667)"
  );
  # https://access.redhat.com/site/articles/273633
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/articles/273633"
  );
  # https://access.redhat.com/site/articles/11258
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/articles/11258"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2017:2645"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2017-7538"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N");
  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:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:satellite-schema");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-app");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-applet");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-cdn");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-config-files");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-config-files-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-config-files-tool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-iss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-iss-export");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-package-push-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-sql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-sql-oracle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-sql-postgresql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-xml-export-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-backend-xmlrpc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-java");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-java-config");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-java-lib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-java-oracle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-java-postgresql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-schema");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:spacewalk-taskomatic");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/07/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/08");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.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) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.x", "Red Hat " + 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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2017:2645";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_NOTE,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;

  if (! (rpm_exists(release:"RHEL6", rpm:"spacewalk-admin-"))) audit(AUDIT_PACKAGE_NOT_INSTALLED, "Satellite Server");

  if (rpm_check(release:"RHEL6", reference:"satellite-schema-5.8.0.33-1.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-app-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-app-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-applet-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-applet-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-cdn-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-cdn-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-config-files-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-config-files-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-config-files-common-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-config-files-common-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-config-files-tool-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-config-files-tool-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-iss-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-iss-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-iss-export-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-iss-export-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-libs-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-libs-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-package-push-server-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-package-push-server-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-server-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-server-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-sql-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-sql-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-sql-oracle-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-sql-oracle-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-sql-postgresql-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-sql-postgresql-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-tools-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-tools-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-xml-export-libs-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-xml-export-libs-2.5.3-151.el6")) flag++;
  if (rpm_exists(rpm:"spacewalk-backend-xmlrpc-2.5.3", release:"RHEL6") && rpm_check(release:"RHEL6", reference:"spacewalk-backend-xmlrpc-2.5.3-151.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"spacewalk-java-2.5.14-95.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"spacewalk-java-config-2.5.14-95.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"spacewalk-java-lib-2.5.14-95.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"spacewalk-java-oracle-2.5.14-95.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"spacewalk-java-postgresql-2.5.14-95.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"spacewalk-schema-2.5.1-50.el6")) flag++;
  if (rpm_check(release:"RHEL6", reference:"spacewalk-taskomatic-2.5.14-95.el6")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_NOTE,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "satellite-schema / spacewalk-backend / spacewalk-backend-app / etc");
  }
}

Redhat

advisories
rhsa
idRHSA-2017:2645
rpms
  • satellite-schema-0:5.8.0.33-1.el6sat
  • spacewalk-backend-0:2.5.3-151.el6sat
  • spacewalk-backend-app-0:2.5.3-151.el6sat
  • spacewalk-backend-applet-0:2.5.3-151.el6sat
  • spacewalk-backend-cdn-0:2.5.3-151.el6sat
  • spacewalk-backend-config-files-0:2.5.3-151.el6sat
  • spacewalk-backend-config-files-common-0:2.5.3-151.el6sat
  • spacewalk-backend-config-files-tool-0:2.5.3-151.el6sat
  • spacewalk-backend-iss-0:2.5.3-151.el6sat
  • spacewalk-backend-iss-export-0:2.5.3-151.el6sat
  • spacewalk-backend-libs-0:2.5.3-151.el6sat
  • spacewalk-backend-package-push-server-0:2.5.3-151.el6sat
  • spacewalk-backend-server-0:2.5.3-151.el6sat
  • spacewalk-backend-sql-0:2.5.3-151.el6sat
  • spacewalk-backend-sql-oracle-0:2.5.3-151.el6sat
  • spacewalk-backend-sql-postgresql-0:2.5.3-151.el6sat
  • spacewalk-backend-tools-0:2.5.3-151.el6sat
  • spacewalk-backend-xml-export-libs-0:2.5.3-151.el6sat
  • spacewalk-backend-xmlrpc-0:2.5.3-151.el6sat
  • spacewalk-java-0:2.5.14-95.el6sat
  • spacewalk-java-config-0:2.5.14-95.el6sat
  • spacewalk-java-lib-0:2.5.14-95.el6sat
  • spacewalk-java-oracle-0:2.5.14-95.el6sat
  • spacewalk-java-postgresql-0:2.5.14-95.el6sat
  • spacewalk-schema-0:2.5.1-50.el6sat
  • spacewalk-taskomatic-0:2.5.14-95.el6sat