CVE-2021-22982 : Vulnerability Insights and Analysis
Learn about CVE-2021-22982, a buffer overflow vulnerability impacting BIG-IP DNS and GTM versions 13.1.x, 12.1.x, and 11.6.x, potentially leading to a DoS risk. Take immediate steps to mitigate this security threat.
A buffer overflow vulnerability, CVE-2021-22982, impacts BIG-IP DNS and GTM versions 13.1.x before 13.1.0.4, as well as all versions of 12.1.x and 11.6.x. This CVE poses a risk of DoS (Denial of Service) due to the insecure handling and parsing of certain payloads by big3d.
Understanding CVE-2021-22982
This section delves into the specifics of CVE-2021-22982, outlining the vulnerability's description, impact, affected systems, and exploitation mechanism.
What is CVE-2021-22982?
The vulnerability on BIG-IP DNS and GTM versions 13.1.x before 13.1.0.4, and all versions of 12.1.x and 11.6.x, allows threat actors to trigger a buffer overflow by manipulating payloads, potentially leading to a DoS condition.
The Impact of CVE-2021-22982
The exploitation of CVE-2021-22982 could result in a DoS scenario, causing interruption of services and availability on affected systems, ultimately leading to disruptions and potential system crashes.
Technical Details of CVE-2021-22982
This section provides detailed insights into the vulnerability, including its description, affected systems, versions, and exploitation mechanism.
Vulnerability Description
The buffer overflow vulnerability in BIG-IP DNS and GTM versions 13.1.x before 13.1.0.4, and all versions of 12.1.x and 11.6.x, arises from the insufficiently secure handling and parsing of specific payloads by the big3d component, enabling attackers to trigger the overflow.
Affected Systems and Versions
The vulnerability affects BIG-IP DNS and GTM versions 13.1.x (prior to 13.1.0.4), 12.1.x, and 11.6.x. Systems running these versions are at risk of exploitation and subsequent DoS attacks.
Exploitation Mechanism
Threat actors can exploit CVE-2021-22982 by crafting malicious payloads to send to the vulnerable big3d component, triggering a buffer overflow and potentially leading to a DoS condition.
Mitigation and Prevention
In light of CVE-2021-22982, immediate actions and long-term security practices are crucial to mitigate the risks associated with this vulnerability.
Immediate Steps to Take
Immediately update BIG-IP DNS and GTM to the patched versions (13.1.0.4 or later) to mitigate the buffer overflow risk. Additionally, consider implementing network-level protections.
Long-Term Security Practices
Regularly monitor for security updates, apply patches promptly, conduct security assessments, and enhance network defenses to safeguard against potential vulnerabilities like CVE-2021-22982.
Patching and Updates
Stay informed about security advisories from F5 Networks to ensure proactive patching and protection against known vulnerabilities like CVE-2021-22982.