Vulnerabilities > CVE-2019-16375 - Cross-site Scripting vulnerability in Otrs
Attack vector
NETWORK Attack complexity
LOW Privileges required
LOW Confidentiality impact
LOW Integrity impact
LOW Availability impact
NONE Summary
An issue was discovered in Open Ticket Request System (OTRS) 7.0.x through 7.0.11, and Community Edition 5.0.x through 5.0.37 and 6.0.x through 6.0.22. An attacker who is logged in as an agent or customer user with appropriate permissions can create a carefully crafted string containing malicious JavaScript code as an article body. This malicious code is executed when an agent composes an answer to the original article.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
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 family | SuSE Local Security Checks |
| NASL id | OPENSUSE-2020-551.NASL |
| description | Otrs was updated to 5.0.42, fixing lots of bugs and security issues : https://community.otrs.com/otrs-community-edition-5s-patch-level-42/ - CVE-2020-1773 boo#1168029 OSA-2020-10 : - Session / Password / Password token leak An attacker with the ability to generate session IDs or password reset tokens, either by being able to authenticate or by exploiting OSA-2020-09, may be able to predict other users session IDs, password reset tokens and automatically generated passwords. - CVE-2020-1772 boo#1168029 OSA-2020-09 : - Information Disclosure It’s possible to craft Lost Password requests with wildcards in the Token value, which allows attacker to retrieve valid Token(s), generated by users which already requested new passwords. - CVE-2020-1771 boo#1168030 OSA-2020-08 : - Possible XSS in Customer user address book Attacker is able craft an article with a link to the customer address book with malicious content (JavaScript). When agent opens the link, JavaScript code is executed due to the missing parameter encoding. - CVE-2020-1770 boo#1168031 OSA-2020-07 : - Information disclosure in support bundle files Support bundle generated files could contain sensitive information that might be unwanted to be disclosed. - CVE-2020-1769 boo#1168032 OSA-2020-06 : - Autocomplete in the form login screens In the login screens (in agent and customer interface), Username and Password fields use autocomplete, which might be considered as security issue. Update to 5.0.41 https://community.otrs.com/otrs-community-edition-5s-patch-level-41/ - bug#14912 - Installer refers to non-existing documentation - added code to upgrade OTRS from 4 to 5 READ UPGRADING.SUSE - steps 1 to 4 are done by rpm pkg - steps 5 to *END* need to be done manually cause of DB backup Update to 5.0.40 https://community.otrs.com/otrs-community-edition-5s-patch-level-40/ - CVE-2020-1766 boo#1160663 OSA-2020-02: Improper handling of uploaded inline images Due to improper handling of uploaded images it is possible in very unlikely and rare conditions to force the agents browser to execute malicious JavaScript from a special crafted SVG file rendered as inline jpg file. - CVE-2020-1765, OSA-2020-01: Spoofing of From field in several screens An improper control of parameters allows the spoofing of the from fields of the following screens: AgentTicketCompose, AgentTicketForward, AgentTicketBounce and AgentTicketEmailOutbound - run bin/otrs.Console.pl Maint::Config::Rebuild after the upgrade - Update 5.0.39 https://community.otrs.com/otrs-community-edition-5s-pat ch-level-39/ - CVE-2019-18180 boo#1157001 OSA-2019-15: Denial of service OTRS can be put into an endless loop by providing filenames with overly long extensions. This applies to the PostMaster (sending in email) and also upload (attaching files to mails, for example). - CVE-2019-18179 OSA-2019-14: Information Disclosure An attacker who is logged into OTRS as an agent is able to list tickets assigned to other agents, which are in the queue where attacker doesn’t have permissions. Update to 5.0.38 https://community.otrs.com/release-notes-otrs-5s-patch-level-38/ - CVE-2019-16375, boo#1156431 OSA-2019-13: Stored XXS An attacker who is logged into OTRS as an agent or customer user with appropriate permissions can create a carefully crafted string containing malicious JavaScript code as an article body. This malicious code is executed when an agent compose an answer to the original article. Update to 5.0.37 https://community.otrs.com/release-notes-otrs-5s-patch-level-37/ - CVE-2019-13458, boo#1141432, OSA-2019-12 : Information Disclosure An attacker who is logged into OTRS as an agent user with appropriate permissions can leverage OTRS tags in templates in order to disclose hashed user passwords. - CVE-2019-13457, boo#1141431, OSA-2019-11 : Information Disclosure A customer user can use the search results to disclose information from their “company” tickets (with the same CustomerID), even when CustomerDisableCompanyTicketAccess setting is turned on. - CVE-2019-12746, boo#1141430, OSA-2019-10 : Session ID Disclosure A user logged into OTRS as an agent might unknowingly disclose their session ID by sharing the link of an embedded ticket article with third parties. This identifier can be then potentially abused in order to impersonate the agent user. Update to 5.0.36 https://community.otrs.com/release-notes-otrs-5s-patch-level-36/ - CVE-2019-12497, boo#1137614, OSA-2019-09: Information Disclosure In the customer or external frontend, personal information of agents can be disclosed like Name and mail address in external notes. - CVE-2019-12248, boo#1137615, OSA-2019-08: Loading External Image Resources An attacker could send a malicious email to an OTRS system. If a logged in agent user quotes it, the email could cause the browser to load external image resources. Update to 5.0.35 https://community.otrs.com/release-notes-otrs-5s-patch-level-35/ - CVE-2019-10067, boo#1139406, OSA-2019-05 : Reflected and Stored XSS An attacker who is logged into OTRS as an agent user with appropriate permissions may manipulate the URL to cause execution of JavaScript in the context of OTRS. - CVE-2019-9892, boo#1139406, OSA-2019-04 : XXE Processing An attacker who is logged into OTRS as an agent user with appropriate permissions may try to import carefully crafted Report Statistics XML that will result in reading of arbitrary files of OTRS filesystem. - update missing CVE for OSA-2018-10, OSA-2019-01 Update to 5.0.34 - https://community.otrs.com/release-notes-otrs-5s-patch-level-34/ - CVE-2019-9752, boo#1122560, OSA-2019-01: Stored XSS An attacker who is logged into OTRS as an agent or a customer user may upload a carefully crafted resource in order to cause execution of JavaScript in the context of OTRS. Update to 5.0.33 - https://community.otrs.com/release-notes-otrs-5s-patch-level-33/ Update to 5.0.26 - https://www.otrs.com/release-notes-otrs-5s-patch-level-26 - https://www.otrs.com/release-notes-otrsitsm-module-5s-patch-level-26/ - remove obsolete - otrs-scheduler.service - otrs-scheduler.init |
| last seen | 2020-05-03 |
| modified | 2020-04-28 |
| plugin id | 136023 |
| published | 2020-04-28 |
| reporter | This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/136023 |
| title | openSUSE Security Update : otrs (openSUSE-2020-551) |
| code | |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00038.html
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00038.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00066.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00066.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00077.html
- http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00077.html
- https://community.otrs.com/category/security-advisories-en/
- https://community.otrs.com/category/security-advisories-en/
- https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
- https://lists.debian.org/debian-lts-announce/2023/08/msg00040.html
- https://otrs.com/release-notes/otrs-security-advisory-2019-13/
- https://otrs.com/release-notes/otrs-security-advisory-2019-13/