LibreOffice vulnerabilities

Use-after-free vulnerability in LibreOffice before 5.1.4 allows remote attackers to execute arbitrary code via a crafted RTF file, related to stylesheet and superscript tokens.

LibreOffice versions before 5.0.5 allow remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted LwpTocSuperLayout record in a LotusWordPro (lwp) document.

LibreOffice versions before 4.3.5 allow remote attackers to cause a denial of service (invalid write operation and crash) and possibly execute arbitrary code via a crafted RTF file.

LibreOffice version 4.2.4 automatically executes unspecified VBA macros, which may lead to unknown impacts and attack vectors.

LibreOffice before 2017-03-17 has an out-of-bounds write caused by a heap-based buffer overflow related to the ReadJPEG function in vcl/source/filter/jpeg/jpegc.cxx.

LibreOffice before March 14, 2017, has an out-of-bounds write related to the HWPFile::TagsRead function in hwpfilter/source/hwpfile.cxx.

LibreOffice before 2017-01-02 has an out-of-bounds write caused by a heap-based buffer overflow related to the tools::Polygon::Insert function in tools/source/generic/poly.cxx.

LibreOffice before 2017-03-11 has an out-of-bounds write caused by a heap-based buffer overflow in the SVMConverter::ImplConvertFromSVM1 function.

LibreOffice before December 22, 2016, has an out-of-bounds write caused by a heap-based buffer overflow related to the EnhWMFReader::ReadEnhWMF function in vcl/source/filter/wmf/enhwmf.cxx.

LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. A document could name a Java database driver to be loaded from a remote location, so opening the document could run Java code from that location. In fixed versions an entry in a Java class path has to be a file URL.

A vulnerability in LibreOffice allows crafting URLs that expand environment variable or INI file values, potentially leaking sensitive information to a remote server when a document containing such links is opened. The fix for CVE-2024-12426 did not cover all places where a document can supply a URL, and XForms instance data and Calc csv and sql data providers still reached the expansion. In fixed versions these places refuse URLs with internal schemes when the URL comes from the document.

LibreOffice can link to audio and video files from a document, and on Linux it plays them with GStreamer. A linked media file could be an HLS playlist that made GStreamer read the local files and remote URLs it listed while the document loaded, and their contents could end up in the document. In fixed versions LibreOffice does not follow playlists that name further resources, and linked media is under link update control.

LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. A link of the sql type could name a folder of local text files as a database, so opening a document could read a local text file into the sheet. In fixed versions only the csv, html and xml data providers are restored when a document is loaded.

LibreOffice Calc can link a cell range to an external csv data source, and the link is saved in the document. Such a link was fetched while the document loaded, so opening a document could read a local file into the sheet, or make a request to a host of the document's choosing. In fixed versions external data links are updated under the same link update control as other links in a spreadsheet.

LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. Through such a link a document could open an embedded Firebird database that wrote a file to any location the user could write to. In fixed versions an embedded Firebird database can open or create files only inside its own private directory.

LibreOffice can import PICT images, which may be embedded in documents. An out-of-bounds read occurs when importing an image that uses a colour palette because the palette index is not checked against the number of entries. In fixed versions, the palette index is limited to the entries present.

In LibreOffice, URLs could be constructed that expand environment variables or INI file values, potentially exfiltrating sensitive information to a remote server when opening a document containing such links. The check added for CVE-2024-12426 did not recognise every way of naming the package content provider, so a URL naming it differently still reached the expansion. In fixed versions, the package content provider is matched when the URL is checked.

LibreOffice converts CFF fonts to Type 1 when subsetting a font, which occurs when exporting a document to PDF; CFF fonts may be embedded in documents. A stack buffer overflow exists in this conversion because converted operators are written into a fixed-size buffer without checking if they still fit. In fixed versions, the remaining capacity is tracked and conversion stops when it is used up.

LibreOffice can read CFF fonts, which may be embedded in documents. A stack buffer overflow exists when reading the hints of a glyph because the number of hints is checked against the wrong bound. In fixed versions, the hint count is checked against the actual capacity of the array.

LibreOffice Draw can import PDF documents. A heap buffer overflow exists when importing a stream object because the stream length is taken from its own dictionary and not checked against the actual number of bytes present. In fixed versions, the declared length is clamped to the bytes actually read.

LibreOffice Draw can import PDF documents. A heap buffer overflow exists when importing an encrypted document because the decryption key length is taken from the document's encryption dictionary and used to fill a fixed-size key buffer without being checked. In fixed versions, a declared key length larger than the buffer is rejected.

LibreOffice can import WMF graphics, which may be embedded in documents. A heap buffer overflow exists when importing a text record that carries its own character advance widths because the count of advance values and the text length are read separately and not required to agree. In fixed versions, an advance array shorter than its text is ignored.

LibreOffice has a stack buffer overflow when importing presentations in the legacy PPT format. This occurs during the import of a colour-replacement record when the combined colour counts exceed the size of the colour tables.

LibreOffice has a heap buffer overflow vulnerability when replaying deferred parser events for a text box element in OOXML (DOCX) documents. The issue arises from assuming a handler object is of one type, leading to writes beyond the end of the allocation.

LibreOffice has a heap buffer overflow vulnerability when importing EMF+ graphics, which can lead to memory corruption. The issue arises from incorrectly calculating the allocation size for a gradient, potentially resulting in improper memory allocation.

LibreOffice had a heap buffer overflow vulnerability when importing DXF polylines. The point count from the file was truncated to a 16-bit value, leading to writing past the end of the buffer when the point count exceeded this range.

An Authentication Bypass vulnerability existed where the application bundled an interpreter (Python) that inherits the Transparency, Consent, and Control (TCC) permissions granted by the user to the main application bundle. By executing the bundled interpreter directly the attacker's scripts run with the application's TCC privileges. In fixed versions parent-constraints are used to allow only the main application to launch interpreter with those permissions. This issue affects LibreOffice on macOS: from 25.2 before < 25.2.4.