LibreOffice up to 6.2.4 Event Python Command input validation

Summaryinfo

A vulnerability has been found in LibreOffice up to 6.2.4 and classified as critical. This affects an unknown part of the component Event Handler. The manipulation as part of Python Command leads to input validation. This vulnerability is traded as CVE-2019-9848. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in LibreOffice up to 6.2.4 (Office Suite Software). It has been rated as critical. This issue affects an unknown part of the component Event Handler. The manipulation as part of a Python Command leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was shared 07/17/2019 (Website). It is possible to read the advisory at libreoffice.org. The identification of this vulnerability is CVE-2019-9848 since 03/17/2019. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

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 6.2.5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (276434). The entry VDB-138240 is related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Office Suite Software

Name

• LibreOffice

Version

• 6.2.0
• 6.2.1
• 6.2.2
• 6.2.3
• 6.2.4

License

• open-source

CPE 2.3info

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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