CVE-2021-32611 Explained : Impact and Mitigation
Learn about CVE-2021-32611, a NULL pointer dereference flaw in Antisip eXosip2 up to 5.2.0, allowing denial of service or code execution. Find mitigation steps and best practices.
A NULL pointer dereference vulnerability exists in eXcall_api.c in Antisip eXosip2 through 5.2.0 when handling certain 3xx redirect responses.
Understanding CVE-2021-32611
This CVE-2021-32611 vulnerability involves a NULL pointer dereference issue in the eXcall_api.c component of Antisip eXosip2 up to version 5.2.0, particularly when processing specific 3xx redirect responses.
What is CVE-2021-32611?
CVE-2021-32611 is a security flaw in the eXcall_api.c module of Antisip eXosip2 versions up to 5.2.0 that could lead to a NULL pointer dereference when handling certain 3xx redirect responses.
The Impact of CVE-2021-32611
Exploitation of this vulnerability could result in a denial of service (DoS) condition or potentially allow an attacker to execute arbitrary code on the affected system, leading to a compromise of system integrity.
Technical Details of CVE-2021-32611
In-depth technical information about the CVE-2021-32611 vulnerability.
Vulnerability Description
The vulnerability arises due to improper handling of specific 3xx redirect responses in the eXcall_api.c file, resulting in a NULL pointer dereference.
Affected Systems and Versions
Antisip eXosip2 versions up to 5.2.0 are vulnerable to CVE-2021-32611. Users with affected versions should take immediate action to mitigate the risk.
Exploitation Mechanism
Attackers can exploit this vulnerability by sending crafted 3xx redirect responses to the target system, triggering the NULL pointer dereference and potentially causing a system crash or remote code execution.
Mitigation and Prevention
Effective steps to address and prevent the CVE-2021-32611 vulnerability.
Immediate Steps to Take
Users are advised to update Antisip eXosip2 to a patched version that addresses the NULL pointer dereference issue. Additionally, network segmentation and access controls can help limit exposure.
Long-Term Security Practices
Implementing secure coding practices, regular security assessments, and staying informed about software updates and patches can enhance overall security posture and reduce the risk of similar vulnerabilities.
Patching and Updates
Stay informed about security advisories from Antisip regarding CVE-2021-32611, and promptly apply official patches and updates to eliminate the vulnerability and strengthen system security.