CVE-2021-28994 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-28994, a vulnerability in kopano-ical affecting Kopano Groupware Core and Zarafa. Learn about the attack vector, affected versions, and mitigation steps.
A vulnerability known as CVE-2021-28994 has been identified in kopano-ical (formerly zarafa-ical) in various versions of Kopano Groupware Core and Zarafa. This vulnerability allows an attacker to cause memory exhaustion by sending long HTTP headers.
Understanding CVE-2021-28994
This section will cover the essential details regarding CVE-2021-28994.
What is CVE-2021-28994?
The CVE-2021-28994 vulnerability exists in kopano-ical in different versions of Kopano Groupware Core and Zarafa, enabling an attacker to trigger memory exhaustion through lengthy HTTP headers.
The Impact of CVE-2021-28994
Exploitation of this vulnerability can lead to memory depletion, potentially resulting in denial of service (DoS) attacks or performance degradation.
Technical Details of CVE-2021-28994
Here we will delve into the specifics of CVE-2021-28994.
Vulnerability Description
The vulnerability in kopano-ical allows attackers to exploit the system's memory resources by sending excessively long HTTP headers.
Affected Systems and Versions
CVE-2021-28994 affects Kopano Groupware Core versions through 8.7.16, 9.x through 9.1.0, 10.x through 10.0.7, and 11.x through 11.0.1, as well as Zarafa versions 6.30.x through 7.2.x.
Exploitation Mechanism
By crafting and sending HTTP requests with prolonged headers, threat actors can trigger memory exhaustion in vulnerable systems.
Mitigation and Prevention
In this section, we will outline the steps to mitigate the risks associated with CVE-2021-28994.
Immediate Steps to Take
To address this vulnerability, organizations should consider implementing network-level protections, monitoring traffic for any unusual patterns, and applying vendor-provided patches or workarounds.
Long-Term Security Practices
Establishing robust security practices, such as regular security assessments, timely software updates, and user awareness training, can help prevent potential exploitation of vulnerabilities like CVE-2021-28994.
Patching and Updates
It is essential to stay informed about security advisories and updates released by Kopano and Zarafa to apply patches promptly and safeguard systems against known vulnerabilities.