LibreOffice up to 6.2.5 LibreLogo Python Command input validation

Summaryinfo

A vulnerability identified as critical has been detected in LibreOffice up to 6.2.5. This impacts an unknown function of the component LibreLogo. This manipulation as part of Python Command causes input validation. The identification of this vulnerability is CVE-2019-9851. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in LibreOffice up to 6.2.5 (Office Suite Software). Affected by this vulnerability is some unknown functionality of the component LibreLogo. The manipulation as part of a Python Command leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was shared 08/15/2019 (Website). The advisory is shared at libreoffice.org. This vulnerability is known as CVE-2019-9851 since 03/17/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 276434 (TencentOS Server 3: libreoffice (TSSA-2022:0038)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.2.6 eliminates this vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (47298) and Tenable (276434). The entries VDB-140150 and VDB-140148 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Office Suite Software

Name

• LibreOffice

Version

• 6.2.0
• 6.2.1
• 6.2.2
• 6.2.3
• 6.2.4
• 6.2.5

License

• open-source

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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