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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.1848 MFSA 2019-15 Security vulnerabilities fixed in Thunderbird 60.7 23 May 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Thunderbird Publisher: Mozilla Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Execute Arbitrary Code/Commands -- 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 Access Confidential Data -- Remote with User Interaction Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2019-11698 CVE-2019-11694 CVE-2019-11693 CVE-2019-11692 CVE-2019-11691 CVE-2019-9820 CVE-2019-9819 CVE-2019-9818 CVE-2019-9817 CVE-2019-9816 CVE-2019-9815 CVE-2019-9800 CVE-2019-9797 CVE-2019-7317 CVE-2019-5798 CVE-2018-18511 Reference: ASB-2019.0082 ASB-2019.0055 ESB-2019.1821 ESB-2019.1815 Original Bulletin: https://www.mozilla.org/en-US/security/advisories/mfsa2019-15/ - --------------------------BEGIN INCLUDED TEXT-------------------- Mozilla Foundation Security Advisory 2019-15 Security vulnerabilities fixed in Thunderbird 60.7 Announced May 21, 2019 Impact high Products Thunderbird Fixed in Thunderbird 60.7 In general, these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts. # CVE-2019-9815: Disable hyperthreading on content JavaScript threads on macOS Reporter Multiple independent researchers Impact high Description If hyperthreading is not disabled, a timing attack vulnerability exists, similar to previous Spectre attacks. Apple has shipped macOS 10.14.5 with an option to disable hyperthreading in applications running untrusted code in a thread through a new sysctl. Firefox now makes use of it on the main thread and any worker threads. Note: users need to update to macOS 10.14.5 in order to take advantage of this change. References o Bug 1546544 o RIDL and Fallout: MDS attacks # CVE-2019-9816: Type confusion with object groups and UnboxedObjects Reporter Samuel Gross of Google Project Zero Impact high Description A possible vulnerability exists where type confusion can occur when manipulating JavaScript objects in object groups, allowing for the bypassing of security checks within these groups. Note: this vulnerability has only been demonstrated with UnboxedObjects , which are disabled by default on all supported releases. References o Bug 1536768 # CVE-2019-9817: Stealing of cross-domain images using canvas Reporter Luat Nguyen Impact high Description Images from a different domain can be read using a canvas object in some circumstances. This could be used to steal image data from a different site in violation of same-origin policy. References o Bug 1540221 # CVE-2019-9818: Use-after-free in crash generation server Reporter Thomas Imbert Impact high Description A race condition is present in the crash generation server used to generate data for the crash reporter. This issue can lead to a use-after-free in the main process, resulting in a potentially exploitable crash and a sandbox escape. Note: this vulnerability only affects Windows. Other operating systems are unaffected. References o Bug 1542581 # CVE-2019-9819: Compartment mismatch with fetch API Reporter Nils Impact high Description A vulnerability where a JavaScript compartment mismatch can occur while working with the fetch API, resulting in a potentially exploitable crash. References o Bug 1532553 # CVE-2019-9820: Use-after-free of ChromeEventHandler by DocShell Reporter Nils Impact high Description A use-after-free vulnerability can occur in the chrome event handler when it is freed while still in use. This results in a potentially exploitable crash. References o Bug 1536405 # CVE-2019-11691: Use-after-free in XMLHttpRequest Reporter Nils Impact high Description A use-after-free vulnerability can occur when working with XMLHttpRequest (XHR) in an event loop, causing the XHR main thread to be called after it has been freed. This results in a potentially exploitable crash. References o Bug 1542465 # CVE-2019-11692: Use-after-free removing listeners in the event listener manager Reporter Nils Impact high Description A use-after-free vulnerability can occur when listeners are removed from the event listener manager while still in use, resulting in a potentially exploitable crash. References o Bug 1544670 # CVE-2019-11693: Buffer overflow in WebGL bufferdata on Linux Reporter crixer Impact high Description The bufferdata function in WebGL is vulnerable to a buffer overflow with specific graphics drivers on Linux. This could result in malicious content freezing a tab or triggering a potentially exploitable crash. Note: this issue only occurs on Linux. Other operating systems are unaffected. References o Bug 1532525 # CVE-2019-7317: Use-after-free in png_image_free of libpng library Reporter Salvatore Bonaccorso Impact high Description A use-after-free vulnerability was discovered in the png_image_free function in the libpng library. This could lead to denial of service or a potentially exploitable crash when a malformed image is processed. References o Bug 1542829 # CVE-2019-9797: Cross-origin theft of images with createImageBitmap Reporter AaylaSecura1138 Impact high Description Cross-origin images can be read in violation of the same-origin policy by exporting an image after using createImageBitmap to read the image and then rendering the resulting bitmap image within a canvas element. References o Bug 1528909 # CVE-2018-18511: Cross-origin theft of images with ImageBitmapRenderingContext Reporter AaylaSecura1138 Impact high Description Cross-origin images can be read from a canvas element in violation of the same-origin policy using the transferFromImageBitmap method. References o Bug 1526218 # CVE-2019-11694: Uninitialized memory memory leakage in Windows sandbox Reporter Jeremy Fetiveau of SSD Secure Disclosure Impact moderate Description A vulnerability exists in the Windows sandbox where an uninitialized value in memory can be leaked to a renderer from a broker when making a call to access an otherwise unavailable file. This results in the potential leaking of information stored at that memory location. Note: this issue only occurs on Windows. Other operating systems are unaffected. References o Bug 1534196 # CVE-2019-11698: Theft of user history data through drag and drop of hyperlinks to and from bookmarks Reporter Abdulrahman Alqabandi Impact moderate Description If a crafted hyperlink is dragged and dropped to the bookmark bar or sidebar and the resulting bookmark is subsequently dragged and dropped into the web content area, an arbitrary query of a user's browser history can be run and transmitted to the content page via drop event data. This allows for the theft of browser history by a malicious site. References o Bug 1543191 # CVE-2019-5798: Out-of-bounds read in Skia Reporter Tran Tien Hung of Viettel Cyber Security Impact moderate Description An out-of-bounds read can occur in the Skia library during path transformations. This could result in the exposure of data stored in memory. References o Bug 1535518 # CVE-2019-9800: Memory safety bugs fixed in Firefox 67, Firefox ESR 60.7, and Thunderbird 60.7 Reporter Mozilla developers and community Impact critical Description Mozilla developers and community members Olli Pettay, Bogdan Tara, Jan de Mooij, Jason Kratzer, Jan Varga, Gary Kwong, Tim Guan-tin Chien, Tyson Smith, Ronald Crane, and Ted Campbell reported memory safety bugs present in Firefox 66, Firefox ESR 60.6, and Thunderbird 60.6. 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. References o Memory safety bugs fixed in Firefox 67, Firefox ESR 60.7, and Thunderbird 60.7 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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