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.

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 remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-1598 advisory.

    - Resolves: rhbz#1743958 CVE-2019-9849, etc.

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 remote Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4102-1 advisory.

    It was 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-2019-9850, CVE-2019-9851)

    It was discovered that LibreOffice incorrectly handled embedded scripts in document files. If a user were     tricked into opening a specially crafted document, a remote attacker could possibly execute arbitrary     code. (CVE-2019-9852)

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 its self-reported version, the LibreOffice application running on the remote host is prior to 6.2.6.
It is, therefore, affected by multiple vulnerabilities:
  - Protection that was added to mitigate CVE-2019-9848 which prevents LibreLogo from being called from a document event     handler. However, insufficient validation of URL encoded characters could allow an attacker to bypass these protections     and trigger LibreLogo from script event handlers. (CVE-2019-9850)

  - It is possible for documents to specify that pre-installed scripts be executed on global script events like document-open, etc. (CVE-2019-9851)

  - A feature of this application is that documents can make use of pre-installed macros that can be executed on various     script events, the macros are supposed to only be able to access scripts in share/Scripts/python and user/Scripts/python     sub-directories of the applications install. However, due to not properly sanitizing URL encoded characters this can be     bypassed to allow execution of scripts in other directories. (CVE-2019-9852) Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

This update for libreoffice to version 6.2.7.1 fixes the following issues :

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)

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

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.

* libreoffice: LibreLogo script can be manipulated into executing arbitrary python commands * libreoffice: Insufficient URL validation allowing LibreLogo script execution * libreoffice: LibreLogo global-event script execution * libreoffice: Insufficient URL encoding flaw in allowed script location check * libreoffice: Insufficient URL decoding flaw in categorizing macro location * libreoffice: Unsafe URL assembly flaw in allowed script location check * libreoffice: Remote resources protection module not applied to bullet graphics

发现 LibreOffice 未能正确处理 LibreLogo 脚本。如果用户受到诱骗打开特别构建的文档，远程攻击者可造成 LibreOffice 执行任意代码。（CVE-2019-9850、CVE-2019-9851）

据发现 LibreOffice 未能正确处理文档文件中的嵌入式脚本。如果用户受到诱骗打开特制文档，远程攻击者可能执行任意代码。(CVE-2019-9852)

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。

根据其自我报告的版本，远程主机上运行的 LibreOffice 应用程序低于 6.2.6。因而受到多个漏洞的影响：- 为缓解 CVE-2019-9848 而添加的保护，该保护可防止从文档事件处理程序调用 LibreLogo。但是，对 URL 编码字符验证不充分可能允许攻击者绕过这些保护并从脚本事件处理程序触发 LibreLogo。(CVE-2019-9850) - 文档可能会指定在全局脚本事件（例如 document-open 等）上执行预安装的脚本。(CVE-2019-9851) - 此应用程序的一个特点是，文档可以使用可在各种脚本事件上执行的预安装宏，这些宏应该只能访问安装的应用程序的 share/scripts/python 和 user/scripts/python 子目录中的脚本。但是，由于未能正确审查 URL 编码字符，因此可以绕开它以允许执行其他目录中的脚本。(CVE-2019-9852) 请注意，Nessus 并未测试这些问题，而是只依赖于应用程序自我报告的版本号。

* libreoffice：可操纵 LibreLogo 脚本以执行任意 python 命令 * libreoffice：URL 验证不充分，造成 LibreLogo 脚本执行 * libreoffice：LibreLogo 全局事件脚本执行 * libreoffice：允许的脚本位置检查中存在不充分的 URL 编码缺陷 * libreoffice：对宏位置进行分类时存在不充分的 URL 解码缺陷 * libreoffice：允许的脚本位置检查中存在不安全的 URL 汇编缺陷 * libreoffice：远程资源保护模块未应用至项目符号

远程 Oracle Linux 8 主机上安装的程序包受到 ELSA-2020-1598 公告中提及的多个漏洞的影响。

  - LibreOffice 具有“隐藏模式”，在该模式中，只有被视为“可信”位置中的文档可以检索远程资源。此模式不是默认模式，但可由想要禁用 LibreOffice 在文档中包含远程资源的用户启用。存在一个缺陷，即项目符号被版本 6.2.5 之前的此项保护遗漏。此问题影响以下版本：6.2.5 之前的 Document Foundation LibreOffice 版本。(CVE-2019-9849)

  - LibreOffice 通常与 LibreLogo 捆绑，后者是可编程的 turtle 向量图形脚本，可执行启动该脚本的文档中包含的任意 python 命令。LibreOffice 还有一项功能，即其中的文档可以指定可在各种文档脚本事件（例如 mouse-over 等）上执行的预安装脚本。已添加保护以解决 CVE-2019-9848，进而阻止通过脚本事件处理程序调用 LibreLogo。然而，LibreOffice 中的 url 验证不足漏洞允许恶意绕过该保护，并且会再次触发通过脚本事件处理程序对 LibreLogo 的调用。此问题影响以下版本：6.2.6 之前的 Document Foundation LibreOffice 版本。(CVE-2019-9850)

  - LibreOffice 通常与 LibreLogo 捆绑，后者是可编程的 turtle 向量图形脚本，可执行启动该脚本的文档中包含的任意 python 命令。已添加保护以解决 CVE-2019-9848，进而阻止通过文档事件处理程序（例如鼠标悬停）调用 LibreLogo。
    但 LibreOffice 还有一项功能，即其中的文档可以指定可在各种全局文档脚本事件（例如 document-open 等）上执行的预安装脚本。在已修复的版本中，全局脚本事件处理程序经过验证，与文档脚本事件处理程序具有同等有效性。此问题影响以下版本：
    6.2.6 之前的 Document Foundation LibreOffice 版本。(CVE-2019-9851)

  - LibreOffice 具有一项功能，即其中的文档可以指定可在各种脚本事件（例如 mouse-over、document-open 等）上执行的预安装宏。预计只可以访问安装于 LibreOffice 的 share/Scripts/python 和 /user/Scripts/python 子目录下的脚本。已添加保护以解决 CVE-2019-9852，从而避免目录遍历攻击，此攻击可通过使用 URL 编码攻击破解路径验证步骤，进而在文件系统的任意位置执行脚本。但攻击者可利用 LibreOffice 直接通过传入路径的组件（而不是仅从路径验证步骤已审查的输出）组装最终脚本 URL 位置的方式中的缺陷绕过保护。此问题影响以下版本：6.2.7 之前的 Document Foundation LibreOffice 6.2 版本；6.3.1 之前的 6.3 版本。(CVE-2019-9854)

  - LibreOffice 具有一项功能，即其中的文档可以指定可在各种脚本事件（例如 mouse-over、document-open 等）上执行的预安装宏。预计只可以访问安装于 LibreOffice 的 share/Scripts/python 和 /user/Scripts/python 子目录下的脚本。已添加保护以解决 CVE-2018-16858，从而避免目录遍历攻击，即在文件系统的任意位置执行脚本。但是，URL 编码攻击可能会绕过这项新保护。已修复的版本对描述脚本位置的解析 URL 进行了正确编码，以便随后继续处理。此问题影响以下版本：6.2.6 之前的 Document Foundation LibreOffice 版本。
    (CVE-2019-9852)

  - LibreOffice 文档可包含宏。这些宏的执行方式由文档安全设置控制，通常是在默认情况下阻断宏的执行。处理和分类文档内宏的 URL 的方式中存在一个 URL 解码缺陷，可能会导致构建文档以便宏执行绕过安全设置。已正确检测到这些文档包含宏，并提示用户文档中存在宏，但文档中的宏随后不受安全设置的控制，从而允许执行任意宏。此问题影响：6.2.7 之前的 LibreOffice 6.2 系列；
    6.3.1 之前的 LibreOffice 6.3 系列。(CVE-2019-9853)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

ID	Name	Product	Family	Published	Updated	Severity
129595	Debian DLA-1947-1 : libreoffice security update	Nessus	Debian Local Security Checks	10/7/2019	4/19/2024	critical
135347	CentOS 7 : libreoffice (RHSA-2020:1151)	Nessus	CentOS Local Security Checks	4/10/2020	10/9/2024	critical
180730	Oracle Linux 7 : libreoffice (ELSA-2020-1151)	Nessus	Oracle Linux Local Security Checks	9/7/2023	2/20/2025	critical
180688	Oracle Linux 8 : libreoffice (ELSA-2020-1598)	Nessus	Oracle Linux Local Security Checks	9/7/2023	2/20/2025	critical
128027	Ubuntu 16.04 LTS / 18.04 LTS : LibreOffice vulnerabilities (USN-4102-1)	Nessus	Ubuntu Local Security Checks	8/20/2019	8/27/2024	critical
133474	LibreOffice < 6.2.6 / 6.3 Input Validation (Windows)	Nessus	Windows	2/5/2020	1/19/2023	critical
129045	SUSE SLED12 Security Update : libreoffice (SUSE-SU-2019:2401-1)	Nessus	SuSE Local Security Checks	9/19/2019	4/24/2024	critical
129441	EulerOS 2.0 SP8 : libreoffice (EulerOS-SA-2019-2082)	Nessus	Huawei Local Security Checks	9/30/2019	4/22/2024	critical
135817	Scientific Linux Security Update : libreoffice on SL7.x x86_64 (20200407)	Nessus	Scientific Linux Local Security Checks	4/21/2020	3/15/2024	critical
128027	Ubuntu 16.04 LTS / 18.04 LTS：LibreOffice 漏洞 (USN-4102-1)	Nessus	Ubuntu Local Security Checks	8/20/2019	8/27/2024	critical
133474	LibreOffice < 6.2.6 / 6.3 输入验证 (Windows)	Nessus	Windows	2/5/2020	1/19/2023	critical
135817	Scientific Linux 安全更新：SL7.x x86_64 中的 libreoffice (20200407)	Nessus	Scientific Linux Local Security Checks	4/21/2020	3/15/2024	critical
180688	Oracle Linux 8：libreoffice (ELSA-2020-1598)	Nessus	Oracle Linux Local Security Checks	9/7/2023	2/20/2025	critical

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