CVE-2021-29630 : What You Need to Know

In FreeBSD 13.0-STABLE before n246938-0729ba2f49c9, 12.2-STABLE before r370383, 11.4-STABLE before r370381, 13.0-RELEASE before p4, 12.2-RELEASE before p10, and 11.4-RELEASE before p13, the ggatec daemon in FreeBSD does not validate the size of a response before writing it to a fixed-sized buffer. This vulnerability could allow a malicious attacker in a privileged network position to overwrite the stack of ggatec, potentially leading to the execution of arbitrary code.

Understanding CVE-2021-29630

This section provides detailed insights into the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2021-29630?

CVE-2021-29630 is a vulnerability in FreeBSD that arises due to insufficient validation of response size by the ggatec daemon, posing a risk of stack overwriting and arbitrary code execution.

The Impact of CVE-2021-29630

The security flaw in the ggatec daemon of FreeBSD could be exploited by a malicious actor with network privileges to manipulate the stack, potentially leading to the execution of unauthorized code.

Technical Details of CVE-2021-29630

This section covers a detailed analysis of the vulnerability, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The flaw allows an attacker in a privileged network position to overwrite ggatec's stack, leading to the execution of arbitrary code. This could have severe security implications for affected systems.

Affected Systems and Versions

FreeBSD versions 13.0-RELEASE before p4, 12.2-RELEASE before p10, and 11.4-RELEASE before p13 are impacted by this vulnerability, highlighting the importance of immediate action.

Exploitation Mechanism

By exploiting the ggatec daemon's failure to validate response size, an attacker can manipulate the stack to execute arbitrary code, emphasizing the critical nature of this security issue.

Mitigation and Prevention

Here, we discuss the steps users can take to mitigate the risks posed by CVE-2021-29630 and prevent potential exploitation.

Immediate Steps to Take

Users are advised to apply patches provided by FreeBSD promptly to address the vulnerability and enhance the security posture of their systems.

Long-Term Security Practices

Implementing robust security measures, conducting regular system audits, and staying informed about security updates are essential for safeguarding against similar vulnerabilities in the future.

Patching and Updates

Regularly updating FreeBSD to the latest secure versions and ensuring the ggatec daemon's code is audited for security gaps is crucial in preventing exploitation of this vulnerability.