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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT Security Bulletin ASB-2018.0057.2 Security vulnerabilities fixed in Firefox 59 15 March 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Firefox Operating System: Windows Linux variants Mac OS Android Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Increased Privileges -- Remote with User Interaction Cross-site Scripting -- Remote with User Interaction Denial of Service -- Remote with User Interaction Provide Misleading Information -- Remote with User Interaction Read-only Data Access -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2018-5143 CVE-2018-5142 CVE-2018-5141 CVE-2018-5140 CVE-2018-5138 CVE-2018-5137 CVE-2018-5136 CVE-2018-5135 CVE-2018-5134 CVE-2018-5133 CVE-2018-5132 CVE-2018-5131 CVE-2018-5130 CVE-2018-5129 CVE-2018-5128 CVE-2018-5127 CVE-2018-5126 CVE-2018-5125 Member content until: Friday, April 13 2018 Revision History: March 15 2018: This bulletin erroneously listed Firefox Extended Support Release as affected. March 14 2018: Initial Release OVERVIEW Security vulnerabilities have been fixed in Firefox 59. IMPACT Mozilla has given the following information concerning these vulnerabilities: " CVE-2018-5127: Buffer overflow manipulating SVG animatedPathSegList Description A buffer overflow can occur when manipulating the SVG animatedPathSegList through script. This results in a potentially exploitable crash. CVE-2018-5128: Use-after-free manipulating editor selection ranges A use-after-free vulnerability can occur when manipulating elements, events, and selection ranges during editor operations. This results in a potentially exploitable crash. CVE-2018-5129: Out-of-bounds write with malformed IPC messages A lack of parameter validation on IPC messages results in a potential out-of-bounds write through malformed IPC messages. This can potentially allow for sandbox escape through memory corruption in the parent process. CVE-2018-5130: Mismatched RTP payload type can trigger memory corruption When packets with a mismatched RTP payload type are sent in WebRTC connections, in some circumstances a potentially exploitable crash is triggered. CVE-2018-5131: Fetch API improperly returns cached copies of no-store/no-cache resources Under certain circumstances the fetch() API can return transient local copies of resources that were sent with a no-store or no-cache cache header instead of downloading a copy from the network as it should. This can result in previously stored, locally cached data of a website being accessible to users if they share a common profile while browsing. CVE-2018-5132: WebExtension Find API can search privileged pages The Find API for WebExtensions can search some privileged pages, such as about:debugging, if these pages are open in a tab. This could allow a malicious WebExtension to search for otherwise protected data if a user has it open. CVE-2018-5133: Value of the app.support.baseURL preference is not properly sanitized If the app.support.baseURL preference is changed by a malicious local program to contain HTML and script content, this content is not sanitized. It will be executed if a user loads chrome://browser/content/preferences/in-content/ preferences.xul directly in a tab and executes a search. This stored preference is also executed whenever an EME video player plugin displays a CDM-disabled message as a notification message. CVE-2018-5134: WebExtensions may use view-source: URLs to bypass content restrictions WebExtensions may use view-source: URLs to view local file: URL content, as well as content stored in about:cache, bypassing restrictions that only allow WebExtensions to view specific content. CVE-2018-5135: WebExtension browserAction can inject scripts into unintended contexts WebExtensions can bypass normal restrictions in some circumstances and use browser.tabs.executeScript to inject scripts into contexts where this should not be allowed, such as pages from other WebExtensions or unprivileged about: pages. CVE-2018-5136: Same-origin policy violation with data: URL shared workers A shared worker created from a data: URL in one tab can be shared by another tab with a different origin, bypassing the same-origin policy. CVE-2018-5137: Script content can access legacy extension non-contentaccessible resources A legacy extension's non-contentaccessible, defined resources can be loaded by an arbitrary web page through script. This script does this by using a maliciously crafted path string to reference the resources. Note: this vulnerability does not affect WebExtensions. CVE-2018-5138: Android Custom Tab address spoofing through long domain names A spoofing vulnerability can occur when a malicious site with an extremely long domain name is opened in an Android Custom Tab (a browser panel inside another app) and the default browser is Firefox for Android. This could allow an attacker to spoof which page is actually loaded and in use. Note: this issue only affects Firefox for Android. Other versions and operating systems are unaffected. CVE-2018-5140: Moz-icon images accessible to web content through moz-icon: protocol Image for moz-icons can be accessed through the moz-icon: protocol through script in web content even when otherwise prohibited. This could allow for information leakage of which applications are associated with specific MIME types by a malicious page. CVE-2018-5141: DOS attack through notifications Push API A vulnerability in the notifications Push API where notifications can be sent through service workers by web content without direct user interaction. This could be used to open new tabs in a denial of service (DOS) attack or to display unwanted content from arbitrary URLs to users. CVE-2018-5142: Media Capture and Streams API permissions display incorrect origin with data: and blob: URLs If Media Capture and Streams API permission is requested from documents with data: or blob: URLs, the permission notifications do not properly display the originating domain. The notification states "Unknown protocol" as the requestee, leading to user confusion about which site is asking for this permission. CVE-2018-5143: Self-XSS pasting javascript: URL with embedded tab into addressbar URLs using javascript: have the protocol removed when pasted into the addressbar to protect users from cross-site scripting (XSS) attacks, but if a tab character is embedded in the javascript: URL the protocol is not removed and the script will execute. This could allow users to be socially engineered to run an XSS attack against themselves. CVE-2018-5126: Memory safety bugs fixed in Firefox 59 Mozilla developers and community members Calixte Denizet, Christian Holler, Sebastian Hengst, Jason Kratzer, Tyson Smith, Ryan VanderMeulen, Noemi Erli, Karl Tomlinson, Philipp, Gary Kwong, and Ronald Crane reported memory safety bugs present in Firefox 58. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. CVE-2018-5125: Memory safety bugs fixed in Firefox 59 and Firefox ESR 52.7 Mozilla developers and community members Bob Clary, Olli Pettay, Christian Holler, Nils Ohlmeier, Randell Jesup, Tyson Smith, Ralph Giles, and Philipp reported memory safety bugs present in Firefox 58 and Firefox ESR 52.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. " MITIGATION Mozilla recommends updating Firefox to version 59. [1] REFERENCES [1] Security vulnerabilities fixed in Firefox 59 https://www.mozilla.org/en-US/security/advisories/mfsa2018-06/ AusCERT has made every effort to ensure that the information contained in this document is accurate. However, the decision to use the information described is the responsibility of each user or organisation. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWqmnc4x+lLeg9Ub1AQjWuxAAkxOAlN1Y+GHU1smkoH2t0ey5ghKMR6Yk lq9jni5CRqnRD3PnawJ31u+HkGPRqL9K5mxnOR/nsh769ETLn//+4pt3rwYRRax7 6r431an9a96VGbE8gSlKx+8PGPPTTT8IG1TD9r3f5UROKcQnTG6cYBWO+e8+ubmx xj9ow3ermEGe7LS6tFP3fvSemHtH/lWTvdzfrL/KkZW/PzoDkcNSamuClgibbAQd CLkRVBSAFo870DrbgYqmqAZYtN6yav2MTaM3L9/26d3lXwMkNuQ1QkuxW1RMKB9S F4lOqw5vEP/UW5rPu1b8S+9h52kzyi+e7KWAqeUEjp0Nh1k7FkDz4oMgNuezm+Mv tzPFfa79m9pfnChtsAzX+zjnMs4VLJd16lUQuUUrd5RfCIeqDOIcckKJjXKv+gki 2R/96L5jzkTz2ZCZpPItK1mog6WQd86EiYqWv0CHqY1/BP7ZIe9kfT6aNFvi7y8Y m1GrT+rqKviqzb4dbXZqTLWJp7AmRrgwktB3DZiuJ44qpUF+HKfhtZ9tPHJ9r2Pm 8oTRE14PD9WPhoXpQ3IjuvjPdUZAEzVVKAXOgGy471wDd8AcSGaVFodxv6s6eeod FefUc2ydgU4HFgW2RLTs3ZU/+oWoal6xBjcNZL4ajZuObhTZNEn0ehqNikyBIRuk HGYA3EtR0DM= =zaL6 -----END PGP SIGNATURE-----