遠端 Oracle Linux 7 主機中安裝的套件受到 ELSA-2020-1151 公告中提及的多個弱點影響。

  - LibreOffice 具有「隱蔽模式」，在這種模式下，只有來自被視為「受信任」之位置的文件才可以擷取遠端資源。此模式並非預設模式，但想要停用 LibreOffice 之納入文件內遠端資源功能的使用者可以啟用此模式。存在瑕疵，即項目符號圖形會被此保護機制 (6.2.5 之前版本) 省略。此問題會影響：6.2.5 之前的 Document Foundation LibreOffice 版本。(CVE-2019-9849)

  - LibreOffice 通常隨附於 LibreLogo (一種可程式化的 Turtle 向量圖形指令碼)，它可執行其啟動時所在文件中包含的任意 python 命令。LibreOffice 也有一個功能，即文件可指定預先安裝的指令碼可在多種文件指令碼事件上執行，例如滑鼠停留等。已新增保護，以解決 CVE-2019-9848，阻止從指令碼事件處置程式呼叫 LibreLogo。不過，LibreOffice 中存在 url 驗證不充分弱點，惡意使用者可以繞過該保護機制，並再次觸發從指令碼事件處置程式呼叫 LibreLogo。此問題會影響：6.2.6 之前的 Document Foundation LibreOffice 版本。(CVE-2019-9850)

  - LibreOffice 通常隨附於 LibreLogo (一種可程式化的 Turtle 向量圖形指令碼)，它可執行其啟動時所在文件中包含的任意 python 命令。已新增保護，以解決 CVE-2019-9848，阻止從文件事件指令碼處置程式 (例如滑鼠停留) 呼叫 LibreLogo。
    但是 LibreOffice 也有一個獨立功能，即文件可指定預先安裝的指令碼可在多種全域指令碼事件 (例如文件開啟) 上執行。在修正版中，全域指令碼事件處置程式的驗證方式與文件指令碼事件處置程式的驗證相當。此問題會影響：
    6.2.6 之前的 Document Foundation LibreOffice 版本。(CVE-2019-9851)

  - LibreOffice 有一個功能，即文件可指出預先安裝的巨集可在多種文件指令碼事件 (例如滑鼠停留、文件開啟等) 上執行。只有 LibreOffice 安裝的「share/Scripts/python」和「 user/Scripts/python 」子目錄下的指令碼可供存取。已新增保護以解決 CVE-2019-9852，避免目錄遊走攻擊，即藉由利用 URL 編碼攻擊來執行檔案系統上任意位置中的指令碼，以通過路徑驗證步驟。不過，利用 LibreOffice 直接從傳入路徑的元件 (而非僅從路徑驗證步驟的已清理輸出) 組合最終指令碼 URL 位置的方式，可以繞過此保護機制。此問題會影響：Document Foundation LibreOffice 6.2 版的 6.2.7 之前版本、6.3 版的 6.3.1 之前版本。(CVE-2019-9854)

  - LibreOffice 也有一個功能，即文件可指定預先安裝的指令碼可在多種文件事件 (例如滑鼠停留等) 上執行。LibreOffice 通常隨附於 LibreLogo (一種可程式化的 Turtle 向量圖形指令碼)，它可以執行任意 python 命令。使用文件事件功能觸發 LibreLogo 執行文件中所含的 python，就可以建構一個惡意文件，在沒有警告的情況下，以無訊息的方式執行任意 python 命令。在修正的版本中，無法從文件事件處置程式呼叫 LibreLogo。此問題會影響：6.2.5 之前的 Document Foundation LibreOffice 版本。(CVE-2019-9848)

  - LibreOffice 有一個功能，即文件可指出預先安裝的巨集可在多種文件指令碼事件 (例如滑鼠停留、文件開啟等) 上執行。只有 LibreOffice 安裝的「share/Scripts/python」和「 user/Scripts/python 」子目錄下的指令碼可供存取。已新增保護以解決 CVE-2018-16858，避免目錄遊走攻擊，即可以執行檔案系統中任意位置的指令碼。不過，URL 編碼攻擊可繞過此新保護機制。在修正的版本中，描述指令碼位置的剖析後 url 會先正確編碼，然後再進一步處理。此問題會影響：6.2.6 之前的 Document Foundation LibreOffice 版本。
    (CVE-2019-9852)

  - LibreOffice 文件可包含巨集。這些巨集的執行由文件安全性設定控制，通常預設為封鎖巨集的執行。文件中巨集 URL 的處理和分類方式中存在 URL 解碼瑕疵，導致使用者可能建構一個巨集執行繞過安全性設定的文件。這些文件被正確偵測為含有巨集，並提示使用者其存在於文件中，但文件中的巨集隨後並未受到安全性設定控制，因而可以執行任意巨集。此問題會影響：LibreOffice 6.2 系列的 6.2.7 之前版本；
    LibreOffice 6.3 系列的 6.3.1 之前版本。(CVE-2019-9853)

請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-1151 advisory.

    - Resolves: rhbz#1743962 CVE-2019-9848

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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

The version of LibreOffice installed on the remote Windows host is prior to 6.2.5. It is, therefore, affected by multiple vulnerabilities :

  - An arbitrary script execution vulnerability exists due     to a flaw allowing event-based execution of python     scripts within a document. Note, LibreLogo must be     installed for this vulnerability to be exploitable.
    LibreLogo is frequently bundled with LibreOffice.
    (CVE-2019-9848)

  - An information disclosure vulnerability exists due to how     bullet graphics are handled when in 'stealth mode'. An     unauthenticated, remote, attacker could utilize this     vulnerability to cause LibreOffice to perform remote     requests when they would typically not be permitted.
    (CVE-2019-9849)

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

The remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4063-1 advisory.

    Nils Emmerich discovered that LibreOffice incorrectly handled LibreLogo scripts. If a user were tricked     into opening a specially crafted document, a remote attacker could cause LibreOffice to execute arbitrary     code. (CVE-2019-9848)

    Matei Mal Badanoiu discovered that LibreOffice incorrectly handled stealth mode. Contrary to     expectations, bullet graphics could be retrieved from remote locations when running in stealth mode.
    (CVE-2019-9849)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

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

According to the versions of the libreoffice packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - libreoffice: Arbitrary python functions in arbitrary     modules on the filesystem can be executed without     warning (CVE-2018-16858)

  - LibreOffice has a feature where documents can specify     that pre-installed scripts can be executed on various     document events such as mouse-over, etc. LibreOffice is     typically also bundled with LibreLogo, a programmable     turtle vector graphics script, which can be manipulated     into executing arbitrary python commands. By using the     document event feature to trigger LibreLogo to execute     python contained within a document a malicious document     could be constructed which would execute arbitrary     python commands silently without warning. In the fixed     versions, LibreLogo cannot be called from a document     event handler. This issue affects: Document Foundation     LibreOffice versions prior to 6.2.5.(CVE-2019-9848)

  - LibreOffice is typically bundled with LibreLogo, a     programmable turtle vector graphics script, which can     execute arbitrary python commands contained with the     document it is launched from. LibreOffice also has a     feature where documents can specify that pre-installed     scripts can be executed on various document script     events such as mouse-over, etc. Protection was added,     to address CVE-2019-9848, to block calling LibreLogo     from script event handers. However an insufficient url     validation vulnerability in LibreOffice allowed     malicious to bypass that protection and again trigger     calling LibreLogo from script event handlers. This     issue affects: Document Foundation LibreOffice versions     prior to 6.2.6.(CVE-2019-9850)

  - LibreOffice is typically bundled with LibreLogo, a     programmable turtle vector graphics script, which can     execute arbitrary python commands contained with the     document it is launched from. Protection was added, to     address CVE-2019-9848, to block calling LibreLogo from     document event script handers, e.g. mouse over. However     LibreOffice also has a separate feature where documents     can specify that pre-installed scripts can be executed     on various global script events such as document-open,     etc. In the fixed versions, global script event     handlers are validated equivalently to document script     event handlers. This issue affects: Document Foundation     LibreOffice versions prior to 6.2.6.(CVE-2019-9851)

  - LibreOffice has a feature where documents can specify     that pre-installed macros can be executed on various     script events such as mouse-over, document-open etc.
    Access is intended to be restricted to scripts under     the share/Scripts/python, user/Scripts/python     sub-directories of the LibreOffice install. Protection     was added, to address CVE-2018-16858, to avoid a     directory traversal attack where scripts in arbitrary     locations on the file system could be executed. However     this new protection could be bypassed by a URL encoding     attack. In the fixed versions, the parsed url     describing the script location is correctly encoded     before further processing. This issue affects: Document     Foundation LibreOffice versions prior to     6.2.6.(CVE-2019-9852)

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

This update for libreoffice fixes the following issues :

Updated to version 6.2.7.1.

Security issues fixed :

  - CVE-2019-9849: Disabled fetching remote bullet graphics     in 'stealth mode' (bsc#1141861).

  - CVE-2019-9848: Fixed an arbitrary script execution via     LibreLogo (bsc#1141862).

  - CVE-2019-9851: Fixed LibreLogo global-event script     execution issue (bsc#1146105).

  - CVE-2019-9852: Fixed insufficient URL encoding flaw in     allowed script location check (bsc#1146107).

  - CVE-2019-9850: Fixed insufficient URL validation that     allowed LibreLogo script execution (bsc#1146098).

  - CVE-2019-9854: Fixed unsafe URL assembly flaw     (bsc#1149944).

  - CVE-2019-9855: Fixed path equivalence handling flaw     (bsc#1149943)

Non-security issue fixed :

  - SmartArt: Basic rendering of Trapezoid List     (bsc#1133534).

This update was imported from the SUSE:SLE-15-SP1:Update update project.

Several vulnerabilities were discovered in LibreOffice, the office productivity suite.

CVE-2019-9848

Nils Emmerich discovered that malicious documents could execute arbitrary Python code via LibreLogo.

CVE-2019-9849

Matei Badanoiu discovered that the stealth mode did not apply to bullet graphics.

CVE-2019-9850

It was discovered that the protections implemented in CVE-2019-9848 could be bypassed because of insufficient URL validation.

CVE-2019-9851

Gabriel Masei discovered that malicious documents could execute arbitrary pre-installed scripts.

CVE-2019-9852

Nils Emmerich discovered that the protection implemented to address CVE-2018-16858 could be bypassed by a URL encoding attack.

CVE-2019-9853

Nils Emmerich discovered that malicious documents could bypass document security settings to execute macros contained within the document.

CVE-2019-9854

It was discovered that the protection implemented to address CVE-2019-9852 could be bypassed because of insufficient input sanitization.

For Debian 8 'Jessie', these problems have been fixed in version 1:4.3.3-2+deb8u13.

We recommend that you upgrade your libreoffice packages.

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

The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:1151 advisory.

  - LibreOffice has a feature where documents can specify that pre-installed scripts can be executed on     various document events such as mouse-over, etc. LibreOffice is typically also bundled with LibreLogo, a     programmable turtle vector graphics script, which can be manipulated into executing arbitrary python     commands. By using the document event feature to trigger LibreLogo to execute python contained within a     document a malicious document could be constructed which would execute arbitrary python commands silently     without warning. In the fixed versions, LibreLogo cannot be called from a document event handler. This     issue affects: Document Foundation LibreOffice versions prior to 6.2.5. (CVE-2019-9848)

  - LibreOffice has a 'stealth mode' in which only documents from locations deemed 'trusted' are allowed to     retrieve remote resources. This mode is not the default mode, but can be enabled by users who want to     disable LibreOffice's ability to include remote resources within a document. A flaw existed where bullet     graphics were omitted from this protection prior to version 6.2.5. This issue affects: Document Foundation     LibreOffice versions prior to 6.2.5. (CVE-2019-9849)

  - LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can     execute arbitrary python commands contained with the document it is launched from. LibreOffice also has a     feature where documents can specify that pre-installed scripts can be executed on various document script     events such as mouse-over, etc. Protection was added, to address CVE-2019-9848, to block calling LibreLogo     from script event handers. However an insufficient url validation vulnerability in LibreOffice allowed     malicious to bypass that protection and again trigger calling LibreLogo from script event handlers. This     issue affects: Document Foundation LibreOffice versions prior to 6.2.6. (CVE-2019-9850)

  - LibreOffice is typically bundled with LibreLogo, a programmable turtle vector graphics script, which can     execute arbitrary python commands contained with the document it is launched from. Protection was added,     to address CVE-2019-9848, to block calling LibreLogo from document event script handers, e.g. mouse over.
    However LibreOffice also has a separate feature where documents can specify that pre-installed scripts can     be executed on various global script events such as document-open, etc. In the fixed versions, global     script event handlers are validated equivalently to document script event handlers. This issue affects:
    Document Foundation LibreOffice versions prior to 6.2.6. (CVE-2019-9851)

  - LibreOffice has a feature where documents can specify that pre-installed macros can be executed on various     script events such as mouse-over, document-open etc. Access is intended to be restricted to scripts under     the share/Scripts/python, user/Scripts/python sub-directories of the LibreOffice install. Protection was     added, to address CVE-2018-16858, to avoid a directory traversal attack where scripts in arbitrary     locations on the file system could be executed. However this new protection could be bypassed by a URL     encoding attack. In the fixed versions, the parsed url describing the script location is correctly encoded     before further processing. This issue affects: Document Foundation LibreOffice versions prior to 6.2.6.
    (CVE-2019-9852)

  - LibreOffice documents can contain macros. The execution of those macros is controlled by the document     security settings, typically execution of macros are blocked by default. A URL decoding flaw existed in     how the urls to the macros within the document were processed and categorized, resulting in the     possibility to construct a document where macro execution bypassed the security settings. The documents     were correctly detected as containing macros, and prompted the user to their existence within the     documents, but macros within the document were subsequently not controlled by the security settings     allowing arbitrary macro execution This issue affects: LibreOffice 6.2 series versions prior to 6.2.7;
    LibreOffice 6.3 series versions prior to 6.3.1. (CVE-2019-9853)

  - LibreOffice has a feature where documents can specify that pre-installed macros can be executed on various     script events such as mouse-over, document-open etc. Access is intended to be restricted to scripts under     the share/Scripts/python, user/Scripts/python sub-directories of the LibreOffice install. Protection was     added, to address CVE-2019-9852, to avoid a directory traversal attack where scripts in arbitrary     locations on the file system could be executed by employing a URL encoding attack to defeat the path     verification step. However this protection could be bypassed by taking advantage of a flaw in how     LibreOffice assembled the final script URL location directly from components of the passed in path as     opposed to solely from the sanitized output of the path verification step. This issue affects: Document     Foundation LibreOffice 6.2 versions prior to 6.2.7; 6.3 versions prior to 6.3.1. (CVE-2019-9854)

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
180730	Oracle Linux 7：libreoffice (ELSA-2020-1151)	Nessus	Oracle Linux Local Security Checks	2023/9/7	2025/2/20	critical
180730	Oracle Linux 7 : libreoffice (ELSA-2020-1151)	Nessus	Oracle Linux Local Security Checks	2023/9/7	2025/2/20	critical
127114	LibreOffice < 6.2.5 Multiple Vulnerabilities (Windows)	Nessus	Windows	2019/8/5	2019/10/3	critical
126815	Ubuntu 16.04 LTS / 18.04 LTS : LibreOffice vulnerabilities (USN-4063-1)	Nessus	Ubuntu Local Security Checks	2019/7/19	2024/8/27	critical
129133	EulerOS 2.0 SP5 : libreoffice (EulerOS-SA-2019-1976)	Nessus	Huawei Local Security Checks	2019/9/23	2024/4/24	critical
129346	openSUSE Security Update : libreoffice (openSUSE-2019-2183)	Nessus	SuSE Local Security Checks	2019/9/25	2024/4/23	critical
129595	Debian DLA-1947-1 : libreoffice security update	Nessus	Debian Local Security Checks	2019/10/7	2024/4/19	critical
135347	CentOS 7 : libreoffice (RHSA-2020:1151)	Nessus	CentOS Local Security Checks	2020/4/10	2024/10/9	critical

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