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.

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。

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.

Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  - 如果 XML 檔案隨附內容安全性原則且該 XML 檔案包含 XSL 樣式表則內容安全性原則將不會套用至 XSL 樣式表的內容。如果 XSL 工作表
    包含 JavaScript則會繞過套用至 XML 文件的任何內容安全性原則限制。此弱點會影響 Firefox < 72。(CVE-2019-17020)

請注意，Nessus 依賴供應商報告的套件存在。

ID	名稱	產品	系列	已發布	已更新	嚴重性
132708	Mozilla Firefox < 72.0 多個弱點	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	2024/8/27	high
132709	Mozilla Firefox < 72.0 多個弱點	Nessus	Windows	2020/1/8	2024/4/1	high
248677	Linux Distros 未修補的弱點：CVE-2019-17020	Nessus	Misc.	2025/8/12	2025/8/12	medium

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