Headline
CVE-2023-2255: CVE-2023-2255 | LibreOffice - Free Office Suite - Based on OpenOffice
Improper access control in editor components of The Document Foundation LibreOffice allowed an attacker to craft a document that would cause external links to be loaded without prompt. In the affected versions of LibreOffice documents that used “floating frames” linked to external files, would load the contents of those frames without prompting the user for permission to do so. This was inconsistent with the treatment of other linked content in LibreOffice. This issue affects: The Document Foundation LibreOffice 7.4 versions prior to 7.4.7; 7.5 versions prior to 7.5.3.
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CVE-2023-2255
CVE-2023-2255
Title: CVE-2023-2255 Remote documents loaded without prompt via IFrame
Announced: May 24, 2023
Fixed in: LibreOffice 7.4.7/7.5.3
Description:
LibreOffice supports "Floating Frames", similar to a html IFrame. The frames display their linked document in a floating frame inside the host document.
In affected versions of LibreOffice these floating frames fetch and display their linked document without prompt on loading the host document. This was inconsistent with the behavior of other linked document content such as OLE objects, Writer linked sections or Calc WEBSERVICE formulas which warn the user that there are linked documents and prompts if they should be allowed to update.
In versions >= 7.4.7 (and >= 7.5.3) the existing “update link” manager has been expanded to additionally control the update of the content of IFrames, so such IFrames will not automatically refresh their content unless the user agrees via the prompts.
Thanks to Amel Bouziane-Leblond for discovering this flaw.
Related news
Gentoo Linux Security Advisory 202311-15 - Multiple vulnerabilities have been discovered in LibreOffice, the worst of which could lead to code execution. Versions greater than or equal to 7.5.3.2 are affected.
Ubuntu Security Notice 6144-1 - It was discovered that LibreOffice did not properly validate the number of parameters passed to the formula interpreter, leading to an array index underflow attack. If a user were tricked into opening a specially crafted spreadsheet file, an attacker could possibly use this issue to execute arbitrary code. Amel Bouziane-Leblond discovered that LibreOffice did not prompt the user before loading the host document inside an IFrame. If a user were tricked into opening a specially crafted input file, an attacker could possibly use this issue to cause information disclosure or execute arbitrary code.
Debian Linux Security Advisory 5415-1 - Two security issues were discovered in LibreOffice, which could potentially result in the execution of arbitrary code when loading a malformed spreadsheet document or unacknowledged loading of linked documents within a floating frame.