CVE-2019-17582 : Vulnerability Insights and Analysis
Learn about CVE-2019-17582, a use-after-free vulnerability in libzip 1.2.0 that allows attackers to exploit ZIP archives. Find out the impact, affected systems, and mitigation steps.
A use-after-free vulnerability in libzip 1.2.0 can lead to unspecified consequences when attempting to unzip a malformed ZIP archive. This issue occurs in the _zip_dirent_read function in the zip_dirent.c file.
Understanding CVE-2019-17582
This CVE involves a use-after-free problem in libzip 1.2.0 that occurs before the double free problem reported in CVE-2017-12858.
What is CVE-2019-17582?
The vulnerability allows attackers to exploit a use-after-free issue in the _zip_dirent_read function, potentially causing unspecified consequences when unzipping a malformed ZIP archive.
The Impact of CVE-2019-17582
Attackers can trigger the use-after-free problem, leading to potential security breaches and unauthorized access to sensitive information.
Technical Details of CVE-2019-17582
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The use-after-free vulnerability in libzip 1.2.0 arises in the _zip_dirent_read function, enabling attackers to manipulate ZIP archives and potentially execute malicious code.
Affected Systems and Versions
- Affected Version: libzip 1.2.0
- Systems using libzip 1.2.0 are vulnerable to this exploit.
Exploitation Mechanism
Attackers exploit the vulnerability by crafting a malformed ZIP archive and triggering the use-after-free issue in the _zip_dirent_read function.
Mitigation and Prevention
Protecting systems from CVE-2019-17582 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Update libzip to a patched version that addresses the use-after-free vulnerability.
- Avoid unzipping ZIP archives from untrusted or unknown sources.
Long-Term Security Practices
- Regularly update software and libraries to prevent known vulnerabilities.
- Implement secure coding practices to mitigate memory-related vulnerabilities.
Patching and Updates
- Stay informed about security updates for libzip and apply patches promptly to secure systems against potential exploits.