CVE-2021-27836 Explained : Impact and Mitigation
Discover all you need to know about CVE-2021-27836, a denial of service vulnerability in the function xls_getWorkSheet of libxls 1.6.2. Learn about the impact, affected systems, exploitation, and mitigation steps.
A denial of service vulnerability was discovered in the function xls_getWorkSheet in the libxls library version 1.6.2. Attackers can exploit this issue via a crafted XLS file to cause a denial of service. Here's everything you need to know about CVE-2021-27836.
Understanding CVE-2021-27836
This section provides insights into the nature and impact of the CVE-2021-27836 vulnerability.
What is CVE-2021-27836?
The CVE-2021-27836 is a denial of service vulnerability found in the libxls library version 1.6.2 in the function xls_getWorkSheet. It allows attackers to trigger a denial of service attack by using a specially crafted XLS file.
The Impact of CVE-2021-27836
The impact of CVE-2021-27836 is significant as attackers can exploit this vulnerability to cause a denial of service on systems running the affected version of the libxls library.
Technical Details of CVE-2021-27836
In this section, we delve into the technical aspects of the CVE-2021-27836 vulnerability.
Vulnerability Description
The vulnerability exists in the xls_getWorkSheet function in xls.c in libxls 1.6.2, enabling attackers to launch a denial of service attack through a malicious XLS file.
Affected Systems and Versions
The vulnerability affects systems running libxls 1.6.2.
Exploitation Mechanism
Attackers exploit this vulnerability by leveraging a crafted XLS file to trigger the denial of service condition.
Mitigation and Prevention
This section discusses measures to mitigate the risks associated with CVE-2021-27836.
Immediate Steps to Take
To mitigate the CVE-2021-27836 vulnerability, it is crucial to update the libxls library to a patched version and refrain from opening untrusted XLS files.
Long-Term Security Practices
Implementing secure coding practices, conducting regular security audits, and staying informed about software vulnerabilities are essential for long-term security.
Patching and Updates
Regularly applying security patches and updates for the libxls library is crucial to address known vulnerabilities and enhance system security.