When the RSS Feed preview about:feeds page is framed within another page, it can be used in concert with scripted content for a clickjacking attack that confuses users into downloading and executing an executable file from a temporary directory. *Note: This issue only affects Windows operating systems. Other operating systems are not affected.*. This vulnerability affects Firefox < 64.

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 64.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2018-29 advisory.

  - A buffer overflow occurs when drawing and validating     elements with the ANGLE graphics library, used for WebGL     content, when working with the     VertexBuffer11 module. This results in a     potentially exploitable crash. (CVE-2018-12407)

  - A buffer overflow and out-of-bounds read can occur in     TextureStorage11 within the ANGLE graphics     library, used for WebGL content. This results in a     potentially exploitable crash. (CVE-2018-17466)

  - A use-after-free vulnerability can occur after deleting     a selection element due to a weak reference to the     select element in the options     collection. This results in a potentially exploitable     crash. (CVE-2018-18492)

  - A buffer overflow can occur in the Skia library during     buffer offset calculations with hardware accelerated     canvas 2D actions due to the use of 32-bit calculations     instead of 64-bit. This results in a potentially     exploitable crash. (CVE-2018-18493)

  - A same-origin policy violation allowing the theft of     cross-origin URL entries when using the Javascript     location property to cause a redirection to     another site using     performance.getEntries(). This is a same-     origin policy violation and could allow for data theft.
    (CVE-2018-18494)

  - WebExtension content scripts can be loaded into     about: pages in some circumstances, in     violation of the permissions granted to extensions. This     could allow an extension to interfere with the loading     and usage of these pages and use capabilities that were     intended to be restricted from extensions.
    (CVE-2018-18495)

  - When the RSS Feed preview about:feeds page     is framed within another page, it can be used in concert     with scripted content for a clickjacking attack that     confuses users into downloading and executing an     executable file from a temporary directory. *Note:
    This issue only affects Windows operating systems. Other     operating systems are not affected.* (CVE-2018-18496)

  - Limitations on the URIs allowed to WebExtensions by the     browser.windows.create API can be bypassed     when a pipe in the URL field is used within the     extension to load multiple pages as a single argument.
    This could allow a malicious WebExtension to opened     privileged about: or file:
    locations. (CVE-2018-18497)

  - A potential vulnerability leading to an integer overflow     can occur during buffer size calculations for images     when a raw value is used instead of the checked value.
    This can lead to an out-of-bounds write.
    (CVE-2018-18498)

  - The about:crashcontent and     about:crashparent pages can be triggered by     web content. These pages are used to crash the loaded     page or the browser for test purposes. This issue allows     for a non-persistent denial of service (DOS) attack by a     malicious site which links to these pages.
    (CVE-2018-18510)

  - Mozilla developers and community members Alex Gaynor,     Andr Bargull, Boris Zbarsky, Christian Holler, Jan de     Mooij, Jason Kratzer, Philipp, Ronald Crane, Natalia     Csoregi, and Paul Theriault reported memory safety bugs     present in Firefox 63. 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-2018-12406)

  - Mozilla developers and community members Christian     Holler, Diego Calleja, Andrew McCreight, Jon Coppeard,     Jed Davis, Natalia Csoregi, Nicolas B. Pierron, and     Tyson Smith reported memory safety bugs present in     Firefox 63 and Firefox ESR 60.3. 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-2018-12405)

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 prior to 64 are unpatched for the following vulnerabilities as referenced in the mfsa2018-29 advisory:

 - A memory safety bug was reported that showed evidence of memory corruption that with enough effort could be exploited to run arbitrary code. (CVE-2018-12405, CVE-2018-12406)
 - A buffer overflow occurs when drawing and validating elements with the ANGLE graphics library, used for WebGL content, when working with the 'VertexBuffer11' module. This results in a potentially exploitable crash. (CVE-2018-12407)
 - A buffer overflow and out-of-bounds read can occur in 'TextureStorage11' within the ANGLE graphics library, used for WebGL content. This results in a potentially exploitable crash. (CVE-2018-17466)
 - A use-after-free vulnerability can occur after deleting a selection element due to a weak reference to the select element in the options collection. This results in a potentially exploitable crash. (CVE-2018-18492)
 - A buffer overflow can occur in the Skia library during buffer offset calculations with hardware accelerated canvas 2D actions due to the use of 32-bit calculations instead of 64-bit. This results in a potentially exploitable crash. (CVE-2018-18493)
 - A same-origin policy violation allowing the theft of cross-origin URL entries when using the Javascript location property to cause a redirection to another site using 'performance.getEntries()'. This is a same-origin policy violation and could allow for data theft. (CVE-2018-18494)
 - WebExtension content scripts can be loaded into 'about:' pages in some circumstances, in violation of the permissions granted to extensions. This could allow an extension to interfere with the loading and usage of these pages and use capabilities that were intended to be restricted from extensions. (CVE-2018-18495)
 - When the RSS Feed preview 'about:feeds' page is framed within another page, it can be used in concert with scripted content for a clickjacking attack that confuses users into downloading and executing an executable file from a temporary directory. (CVE-2018-18496)
 - Limitations on the URIs allowed to WebExtensions by the 'browser.windows.create' API can be bypassed when a pipe in the URL field is used within the extension to load multiple pages as a single argument. This could allow a malicious WebExtension to opened privileged 'about:' or 'file:' locations. (CVE-2018-18497)
 - A potential vulnerability leading to an integer overflow can occur during buffer size calculations for images when a raw value is used instead of the checked value. This can lead to an out-of-bounds write. (CVE-2018-18498)
 - The 'about:crashcontent' and 'about:crashparent' pages can be triggered by web content. These pages are used to crash the loaded page or the browser for test purposes. This issue allows for a non-persistent denial of service (DOS) attack by a malicious site which links to these pages. (CVE-2018-18510)

Mozilla Foundation reports :

CVE-2018-12407: Buffer overflow with ANGLE library when using VertexBuffer11 module

CVE-2018-17466: Buffer overflow and out-of-bounds read in ANGLE library with TextureStorage11

CVE-2018-18492: Use-after-free with select element

CVE-2018-18493: Buffer overflow in accelerated 2D canvas with Skia

CVE-2018-18494: Same-origin policy violation using location attribute and performance.getEntries to steal cross-origin URLs

CVE-2018-18495: WebExtension content scripts can be loaded in about:
pages

CVE-2018-18496: Embedded feed preview page can be abused for clickjacking

CVE-2018-18497: WebExtensions can load arbitrary URLs through pipe separators

CVE-2018-18498: Integer overflow when calculating buffer sizes for images

CVE-2018-12406: Memory safety bugs fixed in Firefox 64

CVE-2018-12405: Memory safety bugs fixed in Firefox 64 and Firefox ESR 60.4

The version of Mozilla Firefox installed on the remote Windows host is is prior to 64.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2018-29 advisory.

  - A buffer overflow occurs when drawing and validating     elements with the ANGLE graphics library, used for WebGL     content, when working with the     VertexBuffer11 module. This results in a     potentially exploitable crash. (CVE-2018-12407)

  - A buffer overflow and out-of-bounds read can occur in     TextureStorage11 within the ANGLE graphics     library, used for WebGL content. This results in a     potentially exploitable crash. (CVE-2018-17466)

  - A use-after-free vulnerability can occur after deleting     a selection element due to a weak reference to the     select element in the options     collection. This results in a potentially exploitable     crash. (CVE-2018-18492)

  - A buffer overflow can occur in the Skia library during     buffer offset calculations with hardware accelerated     canvas 2D actions due to the use of 32-bit calculations     instead of 64-bit. This results in a potentially     exploitable crash. (CVE-2018-18493)

  - A same-origin policy violation allowing the theft of     cross-origin URL entries when using the Javascript     location property to cause a redirection to     another site using     performance.getEntries(). This is a same-     origin policy violation and could allow for data theft.
    (CVE-2018-18494)

  - WebExtension content scripts can be loaded into     about: pages in some circumstances, in     violation of the permissions granted to extensions. This     could allow an extension to interfere with the loading     and usage of these pages and use capabilities that were     intended to be restricted from extensions.
    (CVE-2018-18495)

  - When the RSS Feed preview about:feeds page     is framed within another page, it can be used in concert     with scripted content for a clickjacking attack that     confuses users into downloading and executing an     executable file from a temporary directory. *Note:
    This issue only affects Windows operating systems. Other     operating systems are not affected.* (CVE-2018-18496)

  - Limitations on the URIs allowed to WebExtensions by the     browser.windows.create API can be bypassed     when a pipe in the URL field is used within the     extension to load multiple pages as a single argument.
    This could allow a malicious WebExtension to opened     privileged about: or file:
    locations. (CVE-2018-18497)

  - A potential vulnerability leading to an integer overflow     can occur during buffer size calculations for images     when a raw value is used instead of the checked value.
    This can lead to an out-of-bounds write.
    (CVE-2018-18498)

  - The about:crashcontent and     about:crashparent pages can be triggered by     web content. These pages are used to crash the loaded     page or the browser for test purposes. This issue allows     for a non-persistent denial of service (DOS) attack by a     malicious site which links to these pages.
    (CVE-2018-18510)

  - Mozilla developers and community members Alex Gaynor,     Andr Bargull, Boris Zbarsky, Christian Holler, Jan de     Mooij, Jason Kratzer, Philipp, Ronald Crane, Natalia     Csoregi, and Paul Theriault reported memory safety bugs     present in Firefox 63. 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-2018-12406)

  - Mozilla developers and community members Christian     Holler, Diego Calleja, Andrew McCreight, Jon Coppeard,     Jed Davis, Natalia Csoregi, Nicolas B. Pierron, and     Tyson Smith reported memory safety bugs present in     Firefox 63 and Firefox ESR 60.3. 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-2018-12405)

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

ID	Name	Product	Family	Severity
122192	Mozilla Firefox < 64.0	Nessus	MacOS X Local Security Checks	critical
700411	Mozilla Firefox < 64 Multiple Vulnerabilities	Nessus Network Monitor	Web Clients	critical
119636	FreeBSD : mozilla -- multiple vulnerabilities (d10b49b2-8d02-49e8-afde-0844626317af)	Nessus	FreeBSD Local Security Checks	critical
119604	Mozilla Firefox < 64.0 Multiple Vulnerabilities	Nessus	Windows	critical

Detections

Analytics

CVE-2018-18496

high

Tenable Plugins

critical

critical

critical

critical