CVE-2020-35963 : Security Advisory and Response

Fluent Bit before 1.6.4 is affected by an out-of-bounds write vulnerability in flb_gzip_compress due to incorrect calculation of maximum gzip data-size expansion.

Understanding CVE-2020-35963

This CVE involves a specific vulnerability in Fluent Bit that could lead to security issues.

What is CVE-2020-35963?

The vulnerability in flb_gzip_compress in Fluent Bit before version 1.6.4 results from an incorrect calculation of the maximum gzip data-size expansion, leading to an out-of-bounds write.

The Impact of CVE-2020-35963

This vulnerability could be exploited by attackers to potentially execute arbitrary code or cause a denial of service (DoS) condition on affected systems.

Technical Details of CVE-2020-35963

Fluent Bit's vulnerability details and its impact on systems.

Vulnerability Description

The issue arises from an out-of-bounds write in flb_gzip_compress due to incorrect gzip data-size expansion calculation.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions affected: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability to trigger the out-of-bounds write by manipulating gzip data-size calculations.

Mitigation and Prevention

Steps to mitigate the risks associated with CVE-2020-35963.

Immediate Steps to Take

Update Fluent Bit to version 1.6.4 or later to patch the vulnerability.
Monitor for any unusual activities on the system that could indicate exploitation.

Long-Term Security Practices

Regularly update software and systems to prevent known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Apply security patches promptly to ensure systems are protected against known vulnerabilities.