CVE-2021-23192 : Vulnerability Insights and Analysis
Learn about CVE-2021-23192, a flaw in Samba's DCE/RPC implementation allowing attackers to bypass signature requirements. Find out impacted systems and mitigation steps here.
A flaw in the implementation of DCE/RPC in Samba allows an attacker to bypass signature requirements by replacing later fragments with their own data.
Understanding CVE-2021-23192
This CVE identifier is for a vulnerability found in Samba's implementation of DCE/RPC, allowing for potential data replacement attacks.
What is CVE-2021-23192?
The vulnerability in Samba permits an attacker to manipulate data in a fragmented DCE/RPC request, evading signature checks.
The Impact of CVE-2021-23192
The impact of this vulnerability could lead to unauthorized data modification and potential security breaches on systems running Samba versions susceptible to this issue.
Technical Details of CVE-2021-23192
The technical details of CVE-2021-23192 cover the vulnerability description, affected systems and versions, as well as the exploitation mechanism.
Vulnerability Description
The flaw allows an attacker to exploit the fragmentation process of DCE/RPC requests in Samba, enabling them to insert their own data and circumvent signature validation.
Affected Systems and Versions
Samba versions 4.10.0 to 4.15.1 are affected by this vulnerability, while the issue has been addressed in versions 4.15.2, 4.14.10, and 4.13.14.
Exploitation Mechanism
By sending a large DCE/RPC request to a Samba server and fragmenting it, an attacker can replace subsequent fragments with malicious data to bypass signature requirements.
Mitigation and Prevention
Effective mitigation strategies for CVE-2021-23192 involve taking immediate steps and implementing long-term security practices to safeguard systems running Samba.
Immediate Steps to Take
Immediately update Samba to versions 4.15.2, 4.14.10, or 4.13.14 to prevent exploitation of this vulnerability.
Long-Term Security Practices
Regularly monitor and apply security updates to Samba installations to protect against known vulnerabilities and enhance overall system security.
Patching and Updates
Stay informed about security advisories from Samba and related vendors to promptly apply patches and updates addressing critical vulnerabilities like CVE-2021-23192.