Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass Content Security Policy (CSP) restrictions, conduct cross-site scripting (XSS) attacks, or execute arbitrary code.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of Firefox installed on the remote Windows host is prior to 72.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-01 advisory, including the following:

  - During the initialization of a new content process, a pointer offset can be manipulated leading to     memory corruption and a potentially exploitable crash in the parent process. (CVE-2019-17015)

  - When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly     rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in     data exfiltration. (CVE-2019-17016)

  - Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a     crash. We presume that with enough effort that it could be exploited to run arbitrary code.
    (CVE-2019-17017)

  - When in Private Browsing Mode on Windows 10, the Windows keyboard may retain word suggestions to improve     the accuracy of the keyboard. (CVE-2019-17018)

  - When Python was installed on Windows, a python file being served with the MIME type of text/plain could     be executed by Python instead of being opened as a text file when the Open option was selected upon     download. (CVE-2019-17019)

  - If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the     Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL sheet e.g.
    includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to     the XML document. (CVE-2019-17020)

  - During the initialization of a new content process, a race condition occurs that can allow a content     process to disclose heap addresses from the parent process. (CVE-2019-17021)

  - When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape     < and > characters. Because the resulting string is pasted directly into the text node of the element     this does not result in a direct injection into the webpage; however, if a webpage subsequently copies     the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two     WYSIWYG editors were identified with this behavior, more may exist. (CVE-2019-17022)     
  - After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3,     resulting in an invalid state transition in the TLS State Machine. If the client gets into this state,     incoming Application Data records will be ignored. (CVE-2019-17023)

  - Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in     Firefox 71 and Firefox ESR 68.3. Some of these bugs showed evidence of memory corruption and we presume     that with enough effort some of these could have been exploited to run arbitrary code. (CVE-2019-17024)

  - Mozilla developers Karl Tomlinson, Jason Kratzer, Tyson Smith, Jon Coppeard, and Christian Holler     reported memory safety bugs present in Firefox 71. Some of these bugs showed evidence of memory     corruption and we presume that with enough effort some of these could have been exploited to run     arbitrary code. (CVE-2019-17025)

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

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 72.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-01 advisory, including the following:

- When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly   rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in   data exfiltration. (CVE-2019-17016)

- Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a   crash. We presume that with enough effort that it could be exploited to run arbitrary code.
  (CVE-2019-17017)

- If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the   Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL sheet e.g.
  includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to   the XML document. (CVE-2019-17020)

- When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape   < and > characters. Because the resulting string is pasted directly into the text node of the element   this does not result in a direct injection into the webpage; however, if a webpage subsequently copies   the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two   WYSIWYG editors were identified with this behavior, more may exist. (CVE-2019-17022)   
- After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3,   resulting in an invalid state transition in the TLS State Machine. If the client gets into this state,   incoming Application Data records will be ignored. (CVE-2019-17023)

- Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in   Firefox 71 and Firefox ESR 68.3. Some of these bugs showed evidence of memory corruption and we presume   that with enough effort some of these could have been exploited to run arbitrary code. (CVE-2019-17024)

- Mozilla developers Karl Tomlinson, Jason Kratzer, Tyson Smith, Jon Coppeard, and Christian Holler   reported memory safety bugs present in Firefox 71. Some of these bugs showed evidence of memory   corruption and we presume that with enough effort some of these could have been exploited to run   arbitrary code. (CVE-2019-17025)

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

遠端 Windows 主機上安裝的 Firefox 版本比 72.0 舊。因此，會受到 mfsa2020-01 公告中所提及的多個弱點影響，包括下列：- 可在新的內容處理程序初始化期間操控指標位移，這會導致記憶體損毀及父項處理程序中可能遭到惡意利用的當機。(CVE-2019-17015) - 貼上時 <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly     rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in     data exfiltration. (CVE-2019-17016) - Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a     crash. We presume that with enough effort that it could be exploited to run arbitrary code. (CVE-2019-17017) - When in Private Browsing Mode on Windows 10, the Windows keyboard may retain word suggestions to improve     the accuracy of the keyboard. (CVE-2019-17018) - When Python was installed on Windows, a python file being served with the MIME type of text/plain could     be executed by Python instead of being opened as a text file when the Open option was selected upon     download. (CVE-2019-17019) - If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the     Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL sheet e.g. includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to     the XML document. (CVE-2019-17020) - During the initialization of a new content process, a race condition occurs that can allow a content     process to disclose heap addresses from the parent process. (CVE-2019-17021) - When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape     < and > characters. Because the resulting string is pasted directly into the text node of the element     this does not result in a direct injection into the webpage; however, if a webpage subsequently copies     the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two     WYSIWYG editors were identified with this behavior, more may exist. (CVE-2019-17022)      - After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3,     resulting in an invalid state transition in the TLS State Machine. If the client gets into this state,     incoming Application Data records will be ignored. (CVE-2019-17023) - Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in     Firefox 71 and Firefox ESR 68.3. Some of these bugs showed evidence of memory corruption and we presume     that with enough effort some of these could have been exploited to run arbitrary code. (CVE-2019-17024) - Mozilla developers Karl Tomlinson, Jason Kratzer, Tyson Smith, Jon Coppeard, and Christian Holler     reported memory safety bugs present in Firefox 71. Some of these bugs showed evidence of memory     corruption and we presume that with enough effort some of these could have been exploited to run     arbitrary code. (CVE-2019-17025) Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

在 Firefox 中发现多个安全问题。如果用户受到诱骗打开特制的网站，攻击者可能利用这些问题造成拒绝服务，获取敏感信息，绕过内容安全策略 (CSP) 限制，执行跨站脚本 (XSS) 攻击或执行任意代码。

请注意，Tenable Network Security 已直接从 Ubuntu 安全公告中提取上述描述块。Tenable 已尝试在不引入其他问题的情况下，尽可能进行自动清理和排版。

リモートのmacOSまたはMac OS XホストにインストールされているFirefoxのバージョンは、72.0より前です。したがって、mfsa2020-01のアドバイザリに記載されている次のような複数の脆弱性の影響を受けます。- ペースト時 <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly   rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in   data exfiltration. (CVE-2019-17016) - Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a   crash. We presume that with enough effort that it could be exploited to run arbitrary code. (CVE-2019-17017) - If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the   Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL sheet e.g. includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to   the XML document. (CVE-2019-17020) - When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape   < and > characters. Because the resulting string is pasted directly into the text node of the element   this does not result in a direct injection into the webpage; however, if a webpage subsequently copies   the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two   WYSIWYG editors were identified with this behavior, more may exist. (CVE-2019-17022)    - After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3,   resulting in an invalid state transition in the TLS State Machine. If the client gets into this state,   incoming Application Data records will be ignored. (CVE-2019-17023) - Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in   Firefox 71 and Firefox ESR 68.3. Some of these bugs showed evidence of memory corruption and we presume   that with enough effort some of these could have been exploited to run arbitrary code. (CVE-2019-17024) - Mozilla developers Karl Tomlinson, Jason Kratzer, Tyson Smith, Jon Coppeard, and Christian Holler   reported memory safety bugs present in Firefox 71. Some of these bugs showed evidence of memory   corruption and we presume that with enough effort some of these could have been exploited to run   arbitrary code. (CVE-2019-17025) Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

在 Firefox 中發現多個安全性問題。如果使用者遭誘騙而開啟特製網站，攻擊者可能會利用這些弱點造成拒絕服務、取得敏感資訊、繞過內容安全性原則 (CSP) 限制、發動跨網站指令碼 (XSS) 攻擊，或執行任意程式碼。

請注意，Tenable Network Security 已直接從 Ubuntu 安全性公告擷取前置描述區塊。Tenable 已盡量在不造成其他問題的前提下，嘗試自動清理並將其格式化。

远程 Windows 主机上安装的 Firefox 版本低于 72.0。因此受到 mfsa2020-01 公告中提及的多个漏洞的影响，包括如下：- 在初始化新内容进程期间，指针偏移可被操控，从而导致父进程中内存损坏以及潜在可利用的崩溃。(CVE-2019-17015) - 当粘贴 <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly     rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in     data exfiltration. (CVE-2019-17016) - Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a     crash. We presume that with enough effort that it could be exploited to run arbitrary code. (CVE-2019-17017) - When in Private Browsing Mode on Windows 10, the Windows keyboard may retain word suggestions to improve     the accuracy of the keyboard. (CVE-2019-17018) - When Python was installed on Windows, a python file being served with the MIME type of text/plain could     be executed by Python instead of being opened as a text file when the Open option was selected upon     download. (CVE-2019-17019) - If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the     Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL sheet e.g. includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to     the XML document. (CVE-2019-17020) - During the initialization of a new content process, a race condition occurs that can allow a content     process to disclose heap addresses from the parent process. (CVE-2019-17021) - When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape     < and > characters. Because the resulting string is pasted directly into the text node of the element     this does not result in a direct injection into the webpage; however, if a webpage subsequently copies     the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two     WYSIWYG editors were identified with this behavior, more may exist. (CVE-2019-17022)      - After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3,     resulting in an invalid state transition in the TLS State Machine. If the client gets into this state,     incoming Application Data records will be ignored. (CVE-2019-17023) - Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in     Firefox 71 and Firefox ESR 68.3. Some of these bugs showed evidence of memory corruption and we presume     that with enough effort some of these could have been exploited to run arbitrary code. (CVE-2019-17024) - Mozilla developers Karl Tomlinson, Jason Kratzer, Tyson Smith, Jon Coppeard, and Christian Holler     reported memory safety bugs present in Firefox 71. Some of these bugs showed evidence of memory     corruption and we presume that with enough effort some of these could have been exploited to run     arbitrary code. (CVE-2019-17025) Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Firefoxで複数のセキュリティの問題が発見されました。ユーザーが誘導されて特別に細工されたWebサイトを開くと、攻撃者がこれらを悪用し、サービス拒否、秘密情報の取得、コンテンツセキュリティポリシー (CSP) 制限のバイパス、クロスサイトスクリプティング (XSS) 攻撃、任意のコードの実行をする可能性があります。

注意: Tenable Network Security は、前述の説明ブロックを Ubuntu セキュリティアドバイザリからすでに直接抽出しています。Tenable では、新たな問題を持ち込まずに、できる限り自動的に整理して書式設定するようにしています。

远程 macOS 或 Mac OS X 主机上安装的 Firefox 版本低于 72.0。因此，如公告 mfsa2020-01 所述，受到多个漏洞的影响，包括如下：- 当粘贴 <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly   rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in   data exfiltration. (CVE-2019-17016) - Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a   crash. We presume that with enough effort that it could be exploited to run arbitrary code. (CVE-2019-17017) - If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the   Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL sheet e.g. includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to   the XML document. (CVE-2019-17020) - When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape   < and > characters. Because the resulting string is pasted directly into the text node of the element   this does not result in a direct injection into the webpage; however, if a webpage subsequently copies   the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two   WYSIWYG editors were identified with this behavior, more may exist. (CVE-2019-17022)    - After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3,   resulting in an invalid state transition in the TLS State Machine. If the client gets into this state,   incoming Application Data records will be ignored. (CVE-2019-17023) - Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in   Firefox 71 and Firefox ESR 68.3. Some of these bugs showed evidence of memory corruption and we presume   that with enough effort some of these could have been exploited to run arbitrary code. (CVE-2019-17024) - Mozilla developers Karl Tomlinson, Jason Kratzer, Tyson Smith, Jon Coppeard, and Christian Holler   reported memory safety bugs present in Firefox 71. Some of these bugs showed evidence of memory   corruption and we presume that with enough effort some of these could have been exploited to run   arbitrary code. (CVE-2019-17025) Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

遠端 macOS 或 Mac OS X 主機上安裝的 Firefox 版本比 72.0 舊。因此，會受到 mfsa2020-01 公告中所提及的多個弱點影響，包括下列：- 貼上時 <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly   rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in   data exfiltration. (CVE-2019-17016) - Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a   crash. We presume that with enough effort that it could be exploited to run arbitrary code. (CVE-2019-17017) - If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the   Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL sheet e.g. includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to   the XML document. (CVE-2019-17020) - When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape   < and > characters. Because the resulting string is pasted directly into the text node of the element   this does not result in a direct injection into the webpage; however, if a webpage subsequently copies   the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two   WYSIWYG editors were identified with this behavior, more may exist. (CVE-2019-17022)    - After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3,   resulting in an invalid state transition in the TLS State Machine. If the client gets into this state,   incoming Application Data records will be ignored. (CVE-2019-17023) - Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in   Firefox 71 and Firefox ESR 68.3. Some of these bugs showed evidence of memory corruption and we presume   that with enough effort some of these could have been exploited to run arbitrary code. (CVE-2019-17024) - Mozilla developers Karl Tomlinson, Jason Kratzer, Tyson Smith, Jon Coppeard, and Christian Holler   reported memory safety bugs present in Firefox 71. Some of these bugs showed evidence of memory   corruption and we presume that with enough effort some of these could have been exploited to run   arbitrary code. (CVE-2019-17025) Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

リモートの Windows ホストにインストールされている Firefox のバージョンは、72.0より前です。It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-01 advisory, including the following:

  - During the initialization of a new content process, a pointer offset can be manipulated leading to memory corruption and a potentially exploitable crash in the parent process. (CVE-2019-17015)

  - <style> タグをクリップボードからリッチテキストエディターに貼り付ける際に、CSS サニタイザーが不適切に @namespace ルールを書き換えます。 This could allow for injection into certain types of websites resulting in data exfiltration. (CVE-2019-17016)

  - オブジェクトタイプのケース処理が欠落しているため、型の取り違え (Type Confusion) の脆弱性が発生し、クラッシュが引き起こされます。十分な労力をもってすれば、これを悪用し、任意のコードを実行することが可能と考えられます。
    (CVE-2019-17017)

  - When in Private Browsing Mode on Windows 10, the Windows keyboard may retain word suggestions to improve the accuracy of the keyboard. (CVE-2019-17018)

  - When Python was installed on Windows, a python file being served with the MIME type of text/plain could be executed by Python instead of being opened as a text file when the Open option was selected upon download. (CVE-2019-17019)

  - If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL sheet e.g.
    includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to the XML document. (CVE-2019-17020)

  - During the initialization of a new content process, a race condition occurs that can allow a content process to disclose heap addresses from the parent process. (CVE-2019-17021)

  - <style> タグをクリップボードからリッチテキストエディターに貼り付ける際に、CSS サニタイザーが < and > 文字をエスケープしません。 結果の文字列は要素のテキストノードに直接貼り付けられるため、これはWebページへの直接注入にはなりません。ただし、その後 Web ページがノードの innerHTML をコピーして別の innerHTML に割り当てると、XSS の脆弱性が発生します。Two WYSIWYG editors were identified with this behavior, more may exist. (CVE-2019-17022)     
  - HelloRetryRequest の送信後、クライアントが TLS 1.3 より低いプロトコルをネゴシエートして、TLS の状態マシンで無効な状態移行を引き起こす可能性があります。If the client gets into this state, incoming Application Data records will be ignored. (CVE-2019-17023)

  - Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in Firefox 71 and Firefox ESR 68.3. これらのバグの一部にはメモリ破損の証拠が示されており、当社では、十分な労力をもってすればこれらの一部を悪用し、任意のコードを実行することが可能であると推測しています。(CVE-2019-17024)

  - Mozilla developers Karl Tomlinson, Jason Kratzer, Tyson Smith, Jon Coppeard, and Christian Holler reported memory safety bugs present in Firefox 71. これらのバグの一部にはメモリ破損の証拠が示されており、当社では、十分な労力をもってすればこれらの一部を悪用し、任意のコードを実行することが可能であると推測しています。(CVE-2019-17025)

Nessusはこの問題をテストしておらず、代わりにアプリケーションの自己報告されたバージョン番号にのみ依存しています。

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
132854	Ubuntu 16.04 LTS / 18.04 LTS : Firefox vulnerabilities (USN-4234-1)	Nessus	Ubuntu Local Security Checks	2020/1/13	2023/10/20	high
132709	Mozilla Firefox < 72.0 Multiple Vulnerabilities	Nessus	Windows	2020/1/8	2024/4/1	high
132708	Mozilla Firefox < 72.0 Multiple Vulnerabilities	Nessus	MacOS X Local Security Checks	2020/1/8	2024/4/1	high
132709	Mozilla Firefox < 72.0 多個弱點	Nessus	Windows	2020/1/8	2024/4/1	high
132854	Ubuntu 16.04 LTS / 18.04 LTS：Firefox 漏洞 (USN-4234-1)	Nessus	Ubuntu Local Security Checks	2020/1/13	2023/10/20	high
132708	Mozilla Firefox < 72.0の複数の脆弱性	Nessus	MacOS X Local Security Checks	2020/1/8	2024/4/1	high
132854	Ubuntu 16.04 LTS / 18.04 LTS：Firefox 弱點 (USN-4234-1)	Nessus	Ubuntu Local Security Checks	2020/1/13	2023/10/20	high
132709	Mozilla Firefox < 72.0 多个漏洞	Nessus	Windows	2020/1/8	2024/4/1	high
132854	Ubuntu 16.04LTS / 18.04LTS : Firefox の脆弱性 (USN-4234-1)	Nessus	Ubuntu Local Security Checks	2020/1/13	2023/10/20	high
132708	Mozilla Firefox < 72.0 多个漏洞	Nessus	MacOS X Local Security Checks	2020/1/8	2024/4/1	high
132708	Mozilla Firefox < 72.0 多個弱點	Nessus	MacOS X Local Security Checks	2020/1/8	2024/4/1	high
132709	Mozilla Firefox < 72.0の複数の脆弱性	Nessus	Windows	2020/1/8	2024/4/1	high

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