CVE-2019-16228 : Security Advisory and Response

A divide-by-zero error in py-lmdb 0.97 can lead to vulnerabilities when accessing a data.mdb file provided by a malicious actor.

Understanding CVE-2019-16228

This CVE involves a specific vulnerability in py-lmdb 0.97 that can be exploited under certain conditions.

What is CVE-2019-16228?

This CVE identifies a divide-by-zero error in the mdb_env_open2 function of py-lmdb 0.97 when a particular size field returns a zero value, typically occurring during access to a data.mdb file from a malicious source.

The Impact of CVE-2019-16228

The vulnerability can be exploited by attackers to potentially execute arbitrary code or cause a denial of service by crashing the application.

Technical Details of CVE-2019-16228

This section delves into the technical aspects of the CVE.

Vulnerability Description

The issue arises from a divide-by-zero error in the mdb_env_open2 function when a specific size field returns zero, triggered by accessing a data.mdb file from a malicious actor.

Affected Systems and Versions

Product: py-lmdb 0.97
Vendor: N/A
Versions: N/A

Exploitation Mechanism

The vulnerability is exploited when the mdb_env_open2 function encounters a zero value for a particular size field during the processing of a data.mdb file provided by an attacker.

Mitigation and Prevention

Protecting systems from CVE-2019-16228 is crucial to maintaining security.

Immediate Steps to Take

Avoid accessing data.mdb files from untrusted sources.
Implement file integrity checks to detect unauthorized modifications.

Long-Term Security Practices

Regularly update software and libraries to patch known vulnerabilities.
Conduct security audits to identify and address potential weaknesses.

Patching and Updates

Apply patches or updates provided by the software vendor to address the divide-by-zero error in py-lmdb 0.97.