CVE-2021-37529 : Exploit Details and Defense Strategies
Learn about CVE-2021-37529, a double-free vulnerability in fig2dev up to version 3.28a that could lead to denial of service. Find out about the impact, affected systems, and mitigation steps.
A double-free vulnerability exists in fig2dev through 3.28a via the free_stream function in readpics.c, potentially leading to a denial of service.
Understanding CVE-2021-37529
This section provides insights into the nature of CVE-2021-37529.
What is CVE-2021-37529?
CVE-2021-37529 refers to a double-free vulnerability in fig2dev through version 3.28a. The vulnerability exists in the free_stream function in readpics.c, allowing attackers to trigger a denial of service, depending on the context.
The Impact of CVE-2021-37529
The impact of CVE-2021-37529 includes the potential for adversaries to exploit the double-free vulnerability, resulting in a denial of service condition that could impact the availability of affected systems.
Technical Details of CVE-2021-37529
In this section, we delve into the technical aspects of CVE-2021-37529.
Vulnerability Description
The vulnerability arises due to improper handling of memory within fig2dev up to version 3.28a, where the free_stream function in readpics.c can be abused to cause a double-free scenario.
Affected Systems and Versions
fig2dev versions up to 3.28a are affected by CVE-2021-37529, exposing systems that utilize this component to the identified vulnerability.
Exploitation Mechanism
Attackers could potentially exploit this vulnerability by crafting malicious inputs to trigger the double-free condition in fig2dev, leading to a denial of service.
Mitigation and Prevention
This section outlines the strategies to mitigate the risks posed by CVE-2021-37529.
Immediate Steps to Take
Users are advised to update fig2dev to a patched version beyond 3.28a to address the double-free vulnerability and prevent exploitation.
Long-Term Security Practices
Implementing secure coding practices and regular security assessments can help organizations bolster their resilience against similar vulnerabilities.
Patching and Updates
Staying informed about software updates and promptly applying patches provided by the vendor is crucial in maintaining a secure software environment.