CVE-2017-7870 : What You Need to Know
Learn about CVE-2017-7870, a critical out-of-bounds write vulnerability in LibreOffice before 2017-01-02, allowing attackers to execute arbitrary code. Find mitigation steps and prevention measures.
An out-of-bounds write issue was discovered in LibreOffice, specifically before 2017-01-02, due to a heap-based buffer overflow related to the tools::Polygon::Insert function in the poly.cxx file.
Understanding CVE-2017-7870
This CVE relates to a critical vulnerability found in LibreOffice before 2017-01-02.
What is CVE-2017-7870?
The vulnerability is an out-of-bounds write issue caused by a heap-based buffer overflow in the tools::Polygon::Insert function within the poly.cxx file of LibreOffice.
The Impact of CVE-2017-7870
The vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by exploiting the heap-based buffer overflow.
Technical Details of CVE-2017-7870
This section provides more in-depth technical details of the CVE.
Vulnerability Description
The issue is a heap-based buffer overflow related to the tools::Polygon::Insert function in the poly.cxx file within the tools/source/generic directory of LibreOffice.
Affected Systems and Versions
- Product: LibreOffice
- Vendor: N/A
- Versions affected: N/A
Exploitation Mechanism
The vulnerability can be exploited by crafting a malicious document or file that, when opened by a user, triggers the heap-based buffer overflow, potentially leading to arbitrary code execution.
Mitigation and Prevention
Protecting systems from CVE-2017-7870 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Update LibreOffice to the latest version to patch the vulnerability.
- Avoid opening files from untrusted or unknown sources.
- Implement strict file validation and input sanitization mechanisms.
Long-Term Security Practices
- Regularly update software and apply security patches promptly.
- Conduct security training for users to recognize and report suspicious activities.
- Employ network and endpoint security solutions to detect and prevent exploitation attempts.
Patching and Updates
Ensure that all systems running LibreOffice are updated to the latest version that includes the patch for CVE-2017-7870.