Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code.

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 60.7. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2019-15 advisory.

  - 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.
    (CVE-2019-9815)

  - 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.
    (CVE-2019-9816)

  - 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. (CVE-2019-9817)

  - 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.
    (CVE-2019-9818)

  - A vulnerability where a JavaScript compartment mismatch     can occur while working with the fetch API,     resulting in a potentially exploitable crash.
    (CVE-2019-9819)

  - 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.
    (CVE-2019-9820)

  - 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. (CVE-2019-11691)

  - 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.
    (CVE-2019-11692)

  - 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. (CVE-2019-11693)

  - A use-after-free vulnerability was discovered in the     pngimagefree function in the libpng     library. This could lead to denial of service or a     potentially exploitable crash when a malformed image is     processed. (CVE-2019-7317)

  - 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. (CVE-2019-9797)

  - Cross-origin images can be read from a     canvas element in violation of the same-     origin policy using the     transferFromImageBitmap method.
    (CVE-2018-18511)

  - 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. (CVE-2019-11694)

  - 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. (CVE-2019-11698)

  - 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. (CVE-2019-5798)

  - 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.
    (CVE-2019-9800)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Versions of Mozilla Firefox ESR earlier than 60.7 are unpatched for the following vulnerabilities:

 - 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. (CVE-2019-9815)
 - 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. (CVE-2019-9816)
 - 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. (CVE-2019-9817)
 - 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. (CVE-2019-9818)
 - A vulnerability where a JavaScript compartment mismatch can occur while working with the fetch API, resulting in a potentially exploitable crash. (CVE-2019-9819)
 - 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. (CVE-2019-9820)
 - 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. (CVE-2019-11691)
 - 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. (CVE-2019-11692)
 - 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. (CVE-2019-11693)
 - 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. (CVE-2019-7317)
 - 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. (CVE-2019-9797)
 - Cross-origin images can be read from a canvas element in violation of the same-origin policy using the transferFromImageBitmap method. (CVE-2018-18511)
 - 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. (CVE-2019-11694)
 - 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. (CVE-2019-11698)
 - 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. (CVE-2019-5798)
 - 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 and Firefox ESR 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. (CVE-2019-9800)

Versions of Mozilla Thunderbird prior to 60.7 are outdated and thus unpatched for the following vulnerabilities :

 - 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. (CVE-2019-9815)
 - 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. (CVE-2019-9816)
 - 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. (CVE-2019-9817)
 - 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. (CVE-2019-9818)
 - A vulnerability where a JavaScript compartment mismatch can occur while working with the fetch API, resulting in a potentially exploitable crash. (CVE-2019-9819)
 - 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. (CVE-2019-9820)
 - 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. (CVE-2019-11691)
 - 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. (CVE-2019-11692)
 - 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. (CVE-2019-11693)
 - 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. (CVE-2019-7317)
 - 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. (CVE-2019-9797)
 - Cross-origin images can be read from a canvas element in violation of the same-origin policy using the transferFromImageBitmap method. (CVE-2019-18511)
 - 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. (CVE-2019-11694)
 - 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. (CVE-2019-11698)
 - 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. (CVE-2019-5798)
 - 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. (CVE-2019-9800)


ID	Name	Product	Family	Published	Updated	Severity
125343	Debian DSA-4448-1 : firefox-esr - security update	Nessus	Debian Local Security Checks	5/23/2019	5/21/2024	critical
125358	Mozilla Thunderbird < 60.7	Nessus	MacOS X Local Security Checks	5/23/2019	12/5/2022	critical
700733	Mozilla Firefox ESR < 60.7 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	5/21/2019	11/6/2019	high
700742	Mozilla Thunderbird < 60.7 Multiple Vulnerabilities	Nessus Network Monitor	SMTP Clients	5/21/2016	5/21/2019	high

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critical

critical

high

high