Vulnerabilities > CVE-2014-8764 - Improper Authentication vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
PARTIAL Availability impact
NONE Summary
DokuWiki 2014-05-05a and earlier, when using Active Directory for LDAP authentication, allows remote attackers to bypass authentication via a user name and password starting with a null (\0) character, which triggers an anonymous bind.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Authentication Abuse An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker. This attack may exploit assumptions made by the target's authentication procedures, such as assumptions regarding trust relationships or assumptions regarding the generation of secret values. This attack differs from Authentication Bypass attacks in that Authentication Abuse allows the attacker to be certified as a valid user through illegitimate means, while Authentication Bypass allows the user to access protected material without ever being certified as an authenticated user. This attack does not rely on prior sessions established by successfully authenticating users, as relied upon for the "Exploitation of Session Variables, Resource IDs and other Trusted Credentials" attack patterns.
- 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.
- Utilizing REST's Trust in the System Resource to Register Man in the Middle This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to place man in the middle once SSL is terminated. Rest applications premise is that they leverage existing infrastructure to deliver web services functionality. An example of this is a Rest application that uses HTTP Get methods and receives a HTTP response with an XML document. These Rest style web services are deployed on existing infrastructure such as Apache and IIS web servers with no SOAP stack required. Unfortunately from a security standpoint, there frequently is no interoperable identity security mechanism deployed, so Rest developers often fall back to SSL to deliver security. In large data centers, SSL is typically terminated at the edge of the network - at the firewall, load balancer, or router. Once the SSL is terminated the HTTP request is in the clear (unless developers have hashed or encrypted the values, but this is rare). The attacker can utilize a sniffer such as Wireshark to snapshot the credentials, such as username and password that are passed in the clear once SSL is terminated. Once the attacker gathers these credentials, they can submit requests to the web service provider just as authorized user do. There is not typically an authentication on the client side, beyond what is passed in the request itself so once this is compromised, then this is generally sufficient to compromise the service's authentication scheme.
- Man in the Middle Attack This type of attack targets the communication between two components (typically client and server). The attacker places himself in the communication channel between the two components. Whenever one component attempts to communicate with the other (data flow, authentication challenges, etc.), the data first goes to the attacker, who has the opportunity to observe or alter it, and it is then passed on to the other component as if it was never intercepted. This interposition is transparent leaving the two compromised components unaware of the potential corruption or leakage of their communications. The potential for Man-in-the-Middle attacks yields an implicit lack of trust in communication or identify between two components.
Nessus
NASL family Mandriva Local Security Checks NASL id MANDRIVA_MDVSA-2015-185.NASL description Updated dokuwiki packages fix security vulnerabilities : inc/template.php in DokuWiki before 2014-05-05a only checks for access to the root namespace, which allows remote attackers to access arbitrary images via a media file details ajax call (CVE-2014-8761). The ajax_mediadiff function in DokuWiki before 2014-05-05a allows remote attackers to access arbitrary images via a crafted namespace in the ns parameter (CVE-2014-8762). DokuWiki before 2014-05-05b, when using Active Directory for LDAP authentication, allows remote attackers to bypass authentication via a password starting with a null (\0) character and a valid user name, which triggers an unauthenticated bind (CVE-2014-8763). DokuWiki 2014-05-05a and earlier, when using Active Directory for LDAP authentication, allows remote attackers to bypass authentication via a user name and password starting with a null (\0) character, which triggers an anonymous bind (CVE-2014-8764). dokuwiki-2014-09-29a allows swf (application/x-shockwave-flash) uploads by default. This may be used for Cross-site scripting (XSS) attack which enables attackers to inject client-side script into Web pages viewed by other users. (CVE-2014-9253). The dokuwiki-2014-09-29b hotfix source disables swf uploads by default and fixes the CVE-2014-9253 issue. DokuWiki before 20140929c has a security issue in the ACL plugins remote API component. The plugin failed to check for superuser permissions before executing ACL addition or deletion. This means everybody with permissions to call the XMLRPC API also had permissions to set up their own ACL rules and thus circumventing any existing rules (CVE-2015-2172). DokuWiki before 20140929d is vulnerable to a cross-site scripting (XSS) issue in the user manager. The user last seen 2020-06-01 modified 2020-06-02 plugin id 82485 published 2015-04-01 reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/82485 title Mandriva Linux Security Advisory : dokuwiki (MDVSA-2015:185) code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Mandriva Linux Security Advisory MDVSA-2015:185. # The text itself is copyright (C) Mandriva S.A. # include("compat.inc"); if (description) { script_id(82485); script_version("1.5"); script_cvs_date("Date: 2019/08/02 13:32:57"); script_cve_id("CVE-2014-8761", "CVE-2014-8762", "CVE-2014-8763", "CVE-2014-8764", "CVE-2014-9253", "CVE-2015-2172"); script_bugtraq_id(70404, 70412, 70813, 71671, 72827); script_xref(name:"MDVSA", value:"2015:185"); script_name(english:"Mandriva Linux Security Advisory : dokuwiki (MDVSA-2015:185)"); script_summary(english:"Checks rpm output for the updated package"); script_set_attribute( attribute:"synopsis", value:"The remote Mandriva Linux host is missing a security update." ); script_set_attribute( attribute:"description", value: "Updated dokuwiki packages fix security vulnerabilities : inc/template.php in DokuWiki before 2014-05-05a only checks for access to the root namespace, which allows remote attackers to access arbitrary images via a media file details ajax call (CVE-2014-8761). The ajax_mediadiff function in DokuWiki before 2014-05-05a allows remote attackers to access arbitrary images via a crafted namespace in the ns parameter (CVE-2014-8762). DokuWiki before 2014-05-05b, when using Active Directory for LDAP authentication, allows remote attackers to bypass authentication via a password starting with a null (\0) character and a valid user name, which triggers an unauthenticated bind (CVE-2014-8763). DokuWiki 2014-05-05a and earlier, when using Active Directory for LDAP authentication, allows remote attackers to bypass authentication via a user name and password starting with a null (\0) character, which triggers an anonymous bind (CVE-2014-8764). dokuwiki-2014-09-29a allows swf (application/x-shockwave-flash) uploads by default. This may be used for Cross-site scripting (XSS) attack which enables attackers to inject client-side script into Web pages viewed by other users. (CVE-2014-9253). The dokuwiki-2014-09-29b hotfix source disables swf uploads by default and fixes the CVE-2014-9253 issue. DokuWiki before 20140929c has a security issue in the ACL plugins remote API component. The plugin failed to check for superuser permissions before executing ACL addition or deletion. This means everybody with permissions to call the XMLRPC API also had permissions to set up their own ACL rules and thus circumventing any existing rules (CVE-2015-2172). DokuWiki before 20140929d is vulnerable to a cross-site scripting (XSS) issue in the user manager. The user's details were not properly escaped in the user manager's edit form. This allows a registered user to edit her own name (using the change profile option) to include malicious JavaScript code. The code is executed when a super user tries to edit the user via the user manager." ); script_set_attribute( attribute:"see_also", value:"http://advisories.mageia.org/MGASA-2014-0438.html" ); script_set_attribute( attribute:"see_also", value:"http://advisories.mageia.org/MGASA-2014-0540.html" ); script_set_attribute( attribute:"see_also", value:"http://advisories.mageia.org/MGASA-2015-0093.html" ); script_set_attribute( attribute:"see_also", value:"http://advisories.mageia.org/MGASA-2015-0118.html" ); script_set_attribute( attribute:"solution", value:"Update the affected dokuwiki package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P"); 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:mandriva:linux:dokuwiki"); script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:business_server:1"); script_set_attribute(attribute:"patch_publication_date", value:"2015/03/31"); script_set_attribute(attribute:"plugin_publication_date", value:"2015/04/01"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Mandriva Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/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); if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux"); if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu); flag = 0; if (rpm_check(release:"MDK-MBS1", reference:"dokuwiki-20140929-1.4.mbs1")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");NASL family Debian Local Security Checks NASL id DEBIAN_DLA-79.NASL description This fixes a possibility of bypassing the wiki authentication when an Active Directory is used for LDAP authentication. These two CVE are almost the same, one apparently being a superset of the other. They are fixed together. CVE-2014-8763 DokuWiki before 2014-05-05b, when using Active Directory for LDAP authentication, allows remote attackers to bypass authentication via a password starting with a null (\0) character and a valid user name, which triggers an unauthenticated bind. CVE-2014-8764 DokuWiki 2014-05-05a and earlier, when using Active Directory for LDAP authentication, allows remote attackers to bypass authentication via a user name and password starting with a null (\0) character, which triggers an anonymous bind. -- ,--. \_ 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. last seen 2020-03-17 modified 2015-03-26 plugin id 82224 published 2015-03-26 reporter This script is Copyright (C) 2015-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/82224 title Debian DLA-79-1 : dokuwiki security update code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DLA-79-1. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(82224); script_version("1.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2014-8763", "CVE-2014-8764"); script_bugtraq_id(70412); script_name(english:"Debian DLA-79-1 : dokuwiki security update"); script_summary(english:"Checks dpkg output for the updated package."); script_set_attribute( attribute:"synopsis", value:"The remote Debian host is missing a security update." ); script_set_attribute( attribute:"description", value: "This fixes a possibility of bypassing the wiki authentication when an Active Directory is used for LDAP authentication. These two CVE are almost the same, one apparently being a superset of the other. They are fixed together. CVE-2014-8763 DokuWiki before 2014-05-05b, when using Active Directory for LDAP authentication, allows remote attackers to bypass authentication via a password starting with a null (\0) character and a valid user name, which triggers an unauthenticated bind. CVE-2014-8764 DokuWiki 2014-05-05a and earlier, when using Active Directory for LDAP authentication, allows remote attackers to bypass authentication via a user name and password starting with a null (\0) character, which triggers an anonymous bind. -- ,--. \_ 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/2014/10/msg00013.html" ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/squeeze-lts/dokuwiki" ); script_set_attribute( attribute:"solution", value:"Upgrade the affected dokuwiki package." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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:debian:debian_linux:dokuwiki"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0"); script_set_attribute(attribute:"patch_publication_date", value:"2014/10/29"); script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/26"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2015-2020 Tenable Network Security, Inc."); 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:"6.0", prefix:"dokuwiki", reference:"0.0.20091225c-10+squeeze3")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3059.NASL description Two vulnerabilities have been discovered in dokuwiki. Access control in the media manager was insufficiently restricted and authentication could be bypassed when using Active Directory for LDAP authentication. last seen 2020-03-17 modified 2014-10-30 plugin id 78725 published 2014-10-30 reporter This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/78725 title Debian DSA-3059-1 : dokuwiki - security update code #%NASL_MIN_LEVEL 80502 # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Debian Security Advisory DSA-3059. The text # itself is copyright (C) Software in the Public Interest, Inc. # include("compat.inc"); if (description) { script_id(78725); script_version("1.7"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12"); script_cve_id("CVE-2014-8761", "CVE-2014-8762", "CVE-2014-8763", "CVE-2014-8764"); script_bugtraq_id(70404, 70412); script_xref(name:"DSA", value:"3059"); script_name(english:"Debian DSA-3059-1 : dokuwiki - security update"); script_summary(english:"Checks dpkg output for the updated package"); script_set_attribute( attribute:"synopsis", value:"The remote Debian host is missing a security-related update." ); script_set_attribute( attribute:"description", value: "Two vulnerabilities have been discovered in dokuwiki. Access control in the media manager was insufficiently restricted and authentication could be bypassed when using Active Directory for LDAP authentication." ); script_set_attribute( attribute:"see_also", value:"https://packages.debian.org/source/wheezy/dokuwiki" ); script_set_attribute( attribute:"see_also", value:"https://www.debian.org/security/2014/dsa-3059" ); script_set_attribute( attribute:"solution", value: "Upgrade the dokuwiki packages. For the stable distribution (wheezy), these problems have been fixed in version 0.0.20120125b-2+deb7u1." ); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/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:debian:debian_linux:dokuwiki"); script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0"); script_set_attribute(attribute:"patch_publication_date", value:"2014/10/29"); script_set_attribute(attribute:"plugin_publication_date", value:"2014/10/30"); 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:"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:"7.0", prefix:"dokuwiki", reference:"0.0.20120125b-2+deb7u1")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
References
- http://advisories.mageia.org/MGASA-2014-0438.html
- http://secunia.com/advisories/61983
- http://www.debian.org/security/2014/dsa-3059
- http://www.freelists.org/post/dokuwiki/Fwd-Dokuwiki-maybe-security-issue-Null-byte-poisoning-in-LDAP-authentication
- http://www.openwall.com/lists/oss-security/2014/10/13/3
- http://www.openwall.com/lists/oss-security/2014/10/16/9
- https://github.com/splitbrain/dokuwiki/pull/868