CVE-2019-9854

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.

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.

Updated libreoffice packages fix security vulnerabilities:

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 (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 (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 (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 (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 (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 (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…

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.

This update for libreoffice fixes the following issues:

Updated to version 6.2.7.1.

Security issues fixed:

• CVE-2019-9854: Fixed unsafe URL assembly flaw (bsc#1149944).
• CVE-2019-9855: Fixed path equivalence handling flaw (bsc#1149943)

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

These are all security issues fixed in the libreoffice-7.1.5.2-3.13 package on the GA media of openSUSE Tumbleweed.

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)

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 for libreoffice fixes the following issues:

Updated to version 6.2.7.1.

Security issues fixed:

• CVE-2019-9854: Fixed unsafe URL assembly flaw (bsc#1149944).
• CVE-2019-9855: Fixed path equivalence handling flaw (bsc#1149943)

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.