CVE-2019-9851: canonical ubuntu_linux Improper Input Validation

Vulnerability summary

CVE-2019-9851 is a critical (CVSS 9.8) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 77.84% chance of exploitation in the next 30 days, higher than 99.5% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 15-08-2019
   PublishedVulnerability first disclosed.
2. 16-09-2024
   Last modifiedVulnerability information updated.

Description

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.

• CWE-20Improper Input ValidationThe 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.