Vulnerabilities > CVE-2015-0215 - Information Exposure vulnerability in Moodle

047910
CVSS 4.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
SINGLE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
network
low complexity
moodle
CWE-200
nessus

Summary

calendar/externallib.php in Moodle through 2.5.9, 2.6.x before 2.6.7, 2.7.x before 2.7.4, and 2.8.x before 2.8.2 allows remote authenticated users to obtain sensitive calendar-event information via a web-services request.

Vulnerable Configurations

Part Description Count
Application
Moodle
163

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

NASL familyFedora Local Security Checks
NASL idFEDORA_2015-1751.NASL
descriptionThe following security notifications have now been made public : ====================================================================== ======== MSA-15-0001: Insufficient access check in LTI module Description: Absence of capability check in AJAX backend script could allow any enrolled user to search the list of registered tools Issue summary: mod/lti/ajax.php security problems Severity/Risk: Minor Versions affected: 2.8 to 2.8.1, 2.7 to 2.7.3, 2.6 to 2.6.6 and earlier unsupported versions Versions fixed: 2.8.2, 2.7.4 and 2.6.7 Reported by: Petr Skoda Issue no.: MDL-47920 CVE identifier: CVE-2015-0211 Changes (master): http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL- 47920 ====================================================================== ======== MSA-15-0002: XSS vulnerability in course request pending approval page Description: Course summary on course request pending approval page was displayed to the manager unescaped and could be used for XSS attack Issue summary: XSS in course request pending approval page (Privilege Escalation?) Severity/Risk: Serious Versions affected: 2.8 to 2.8.1, 2.7 to 2.7.3, 2.6 to 2.6.6 and earlier unsupported versions Versions fixed: 2.8.2, 2.7.4 and 2.6.7 Reported by: Skylar Kelty Issue no.: MDL-48368 Workaround: Grant permission moodle/course:request only to trusted users CVE identifier: CVE-2015-0212 Changes (master): http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL- 48368 ====================================================================== ======== MSA-15-0003: CSRF possible in Glossary module Description: Two files in the Glossary module lacked a session key check potentially allowing cross-site request forgery Issue summary: Multiple CSRF in mod glossary Severity/Risk: Serious Versions affected: 2.8 to 2.8.1, 2.7 to 2.7.3, 2.6 to 2.6.6 and earlier unsupported versions Versions fixed: 2.8.2, 2.7.4 and 2.6.7 Reported by: Ankit Agarwal Issue no.: MDL-48106 CVE identifier: CVE-2015-0213 Changes (master): http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL- 48106 ====================================================================== ======== MSA-15-0004: Information leak through messaging functions in web-services Description: Through web-services it was possible to access messaging-related functions such as people search even if messaging is disabled on the site Issue summary: Messages external functions doesn
last seen2020-06-05
modified2015-02-16
plugin id81360
published2015-02-16
reporterThis script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/81360
titleFedora 21 : moodle-2.7.5-1.fc21 (2015-1751)
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 2015-1751.
#

include("compat.inc");

if (description)
{
  script_id(81360);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2015-0211", "CVE-2015-0212", "CVE-2015-0213", "CVE-2015-0214", "CVE-2015-0215", "CVE-2015-0216", "CVE-2015-0217", "CVE-2015-0218");
  script_xref(name:"FEDORA", value:"2015-1751");

  script_name(english:"Fedora 21 : moodle-2.7.5-1.fc21 (2015-1751)");
  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:
"The following security notifications have now been made public :

======================================================================
======== MSA-15-0001: Insufficient access check in LTI module

Description: Absence of capability check in AJAX backend script could
allow any enrolled user to search the list of registered tools Issue
summary: mod/lti/ajax.php security problems Severity/Risk: Minor
Versions affected: 2.8 to 2.8.1, 2.7 to 2.7.3, 2.6 to 2.6.6 and
earlier unsupported versions Versions fixed: 2.8.2, 2.7.4 and 2.6.7
Reported by: Petr Skoda Issue no.: MDL-47920 CVE identifier:
CVE-2015-0211 Changes (master):
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-
47920

======================================================================
======== MSA-15-0002: XSS vulnerability in course request pending
approval page

Description: Course summary on course request pending approval page
was displayed to the manager unescaped and could be used for XSS
attack Issue summary: XSS in course request pending approval page
(Privilege Escalation?) Severity/Risk: Serious Versions affected: 2.8
to 2.8.1, 2.7 to 2.7.3, 2.6 to 2.6.6 and earlier unsupported versions
Versions fixed: 2.8.2, 2.7.4 and 2.6.7 Reported by: Skylar Kelty Issue
no.: MDL-48368 Workaround: Grant permission moodle/course:request only
to trusted users CVE identifier: CVE-2015-0212 Changes (master):
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-
48368

======================================================================
======== MSA-15-0003: CSRF possible in Glossary module

Description: Two files in the Glossary module lacked a session key
check potentially allowing cross-site request forgery Issue summary:
Multiple CSRF in mod glossary Severity/Risk: Serious Versions
affected: 2.8 to 2.8.1, 2.7 to 2.7.3, 2.6 to 2.6.6 and earlier
unsupported versions Versions fixed: 2.8.2, 2.7.4 and 2.6.7 Reported
by: Ankit Agarwal Issue no.: MDL-48106 CVE identifier: CVE-2015-0213
Changes (master):
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-
48106

======================================================================
======== MSA-15-0004: Information leak through messaging functions in
web-services

Description: Through web-services it was possible to access
messaging-related functions such as people search even if messaging is
disabled on the site Issue summary: Messages external functions
doesn't check if messaging is enabled Severity/Risk: Minor Versions
affected: 2.8 to 2.8.1, 2.7 to 2.7.3, 2.6 to 2.6.6 and earlier
unsupported versions Versions fixed: 2.8.2, 2.7.4 and 2.6.7 Reported
by: Juan Leyva Issue no.: MDL-48329 Workaround: Disable web services
or disable individual message-related functions CVE identifier:
CVE-2015-0214 Changes (master):
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-
48329

======================================================================
======== MSA-15-0005: Insufficient access check in calendar functions
in web-services

Description: Through web-services it was possible to get information
about calendar events which user did not have enough permissions to
see Issue summary: calendar/externallib.php lacks
self::validate_context($context); Severity/Risk: Minor Versions
affected: 2.8 to 2.8.1, 2.7 to 2.7.3, 2.6 to 2.6.6 and earlier
unsupported versions Versions fixed: 2.8.2, 2.7.4 and 2.6.7 Reported
by: Petr Skoda Issue no.: MDL-48017 CVE identifier: CVE-2015-0215
Changes (master):
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-
48017

======================================================================
======== MSA-15-0006: Capability to grade Lesson module is missing XSS
bitmask

Description: Users with capability to grade in Lesson module were not
reported as users with XSS risk but their feedback was displayed
without cleaning Issue summary: mod/lesson:grade capability missing
RISK_XSS but essay feedback is displayed with noclean=true
Severity/Risk: Minor Versions affected: 2.8 to 2.8.1 Versions fixed:
2.8.2 Reported by: Damyon Wiese Issue no.: MDL-48034 CVE identifier:
CVE-2015-0216 Changes (master):
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-
48034

======================================================================
======== MSA-15-0007: ReDoS possible in the multimedia filter

Description: Not optimal regular expression in the filter could be
exploited to create extra server load or make particular page
unavailable Issue summary: ReDOS in the multimedia filter
Severity/Risk: Serious Versions affected: 2.8 to 2.8.1, 2.7 to 2.7.3,
2.6 to 2.6.6 and earlier unsupported versions Versions fixed: 2.8.2,
2.7.4 and 2.6.7 Reported by: Nicolas Martignoni Issue no.: MDL-48546
Workaround: Disable multimedia filter CVE identifier: CVE-2015-0217
Changes (master):
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-
48546

======================================================================
======== MSA-15-0008: Forced logout through Shibboleth authentication
plugin

Description: It was possible to forge a request to logout users even
when not authenticated through Shibboleth Issue summary: Forced logout
via auth/shibboleth/logout.php Severity/Risk: Serious Versions
affected: 2.8 to 2.8.1, 2.7 to 2.7.3, 2.6 to 2.6.6 and earlier
unsupported versions Versions fixed: 2.8.2, 2.7.4 and 2.6.7 Reported
by: Petr Skoda Issue no.: MDL-47964 Workaround: Deny access to file
auth/shibboleth/logout.php in webserver configuration CVE identifier:
CVE-2015-0218 Changes (master):
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-
47964

======================================================================
========

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."
  );
  # http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-47920
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?727765b3"
  );
  # http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-47964
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?bc5a7611"
  );
  # http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-48017
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?864d680d"
  );
  # http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-48034
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?fc0ccea3"
  );
  # http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-48106
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?0290e85a"
  );
  # http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-48329
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?3ff3fbb8"
  );
  # http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-48368
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?7368900b"
  );
  # http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-48546
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?c3fa9023"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=1183694"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.redhat.com/show_bug.cgi?id=1183695"
  );
  # https://lists.fedoraproject.org/pipermail/package-announce/2015-February/149920.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?e7699242"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected moodle package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:fedoraproject:fedora:moodle");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:21");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/06/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/02/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/02/16");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2020 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:"^21([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 21.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:"FC21", reference:"moodle-2.7.5-1.fc21")) 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, "moodle");
}