Tuesday, February 18, 2025
HomeCVE/vulnerabilityUnpatched RCE Vulnerability in LibreOffice Let Hackers Take Complete Control Of Your...

Unpatched RCE Vulnerability in LibreOffice Let Hackers Take Complete Control Of Your Computer

Published on

SIEM as a Service

Follow Us on Google News

The researcher discovered a code execution vulnerability in LibreOffice let an attacker hack your computer by just sending a weaponized document with macro and promote a user to Open it via LibreOffice.

LibreOffice is an open-source office suite alternative of MS office developed by The Document Foundation that compatible with .doc, .docx, .xls, .xlsx, .ppt, .pptx files and supports all the operating system platform.

Very recently LibreOffice patched an arbitrary script execution vulnerability ( CVE-2019-9848) that allows attackers to execute arbitrary python commands silently without warning to exploit the vulnerable system.

A researcher with the name Alex in Twitter claims that he successfully bypassed the fix of CVE-2019-9848 in LibreOffice 6.2.5.

Earlier this year, Alex also found the similar RCE vulnerability in LibreOffice that allows attackers to exploit the arbitrary code in Windows and Linux Platform.

Nils Emmerich from Insinuator found this vulnerability (CVE-2019-9848) and his research explains that a macro shipped with LibreOffice are executed without prompting the user.

The bug allows an attacker to execute the code on a vulnerable machine and exploit the system without prompting users to enable the macro.

By Default, LibreOffice shipped with LibreLogo (Python Interpreter), a macro to programmable move a turtle vector graphic to executes custom script code that is internally translated to python code and executed.

According to Emmerich, The critical bug exactly resides in the LibreLogo, in which the code is not translated well and just supplying python code as the script code often results in the same code after translation.

A proof of concept where he explained the method to exploit the bug by placing the content, in which Run is a hyperlink executing LibreLogo:run on a mouseover event.

In this PoC explains that the code simply executed without prompt to the user asking to run the code and it is even possible to get code execution  Using forms and the OnFocus event without mouseover event.

Since Alex reported his new bug, LibreOffice Team still working to fix the vulnerability, until then users recommend disabling the LibreLogo component in the current version of LibreOffice.

You can follow us on Linkedin, Twitter, Facebook for daily Cybersecurity updates also you can take the Best Cybersecurity course online to keep yourself updated.

Balaji
Balaji
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Latest articles

Highly Obfuscated .NET sectopRAT Mimic as Chrome Extension

SectopRAT, also known as Arechclient2, is a sophisticated Remote Access Trojan (RAT) developed using...

Threat Actors Trojanize Popular Games to Evade Security and Infect Systems

A sophisticated malware campaign was launched by cybercriminals, targeting users through trojanized versions of...

New Research Aims to Strengthen MITRE ATT&CK for Evolving Cyber Threats

A recent study by researchers from the National University of Singapore and NCS Cyber...

New LLM Vulnerability Exposes AI Models Like ChatGPT to Exploitation

A significant vulnerability has been identified in large language models (LLMs) such as ChatGPT,...

Supply Chain Attack Prevention

Free Webinar - Supply Chain Attack Prevention

Recent attacks like Polyfill[.]io show how compromised third-party components become backdoors for hackers. PCI DSS 4.0’s Requirement 6.4.3 mandates stricter browser script controls, while Requirement 12.8 focuses on securing third-party providers.

Join Vivekanand Gopalan (VP of Products – Indusface) and Phani Deepak Akella (VP of Marketing – Indusface) as they break down these compliance requirements and share strategies to protect your applications from supply chain attacks.

Discussion points

Meeting PCI DSS 4.0 mandates.
Blocking malicious components and unauthorized JavaScript execution.
PIdentifying attack surfaces from third-party dependencies.
Preventing man-in-the-browser attacks with proactive monitoring.

More like this

Juniper Issues Warning About Critical Authentication Bypass Vulnerability

Juniper Networks has issued an urgent security bulletin for its Session Smart Router, Session...

LibreOffice Vulnerabilities Allow Attackers to Write to Files and Extract Data

Two critical vulnerabilities in LibreOffice (CVE-2024-12425 and CVE-2024-12426) expose millions of users to file...

Xerox Printer Vulnerability Exposes Authentication Data Via LDAP and SMB

A critical security vulnerability in Xerox’s Versalink C7025 Multifunction Printer (MFP) has been uncovered,...