CVE-2019-1010239 : Exploit Details and Defense Strategies

The cJSON library version 1.7.8, developed by Dave Gamble, is vulnerable to an issue that involves improperly checking for unusual or exceptional conditions, leading to a null dereference and potential denial of service attacks. The specific component affected is cJSON_GetObjectItemCaseSensitive() function.

Understanding CVE-2019-1010239

This CVE involves a vulnerability in the cJSON library version 1.7.8 that can be exploited through a crafted JSON file.

What is CVE-2019-1010239?

The vulnerability in cJSON version 1.7.8 allows attackers to trigger a null dereference, potentially resulting in denial of service attacks.

The Impact of CVE-2019-1010239

The vulnerability can lead to a null dereference, enabling attackers to launch denial of service attacks by exploiting the cJSON_GetObjectItemCaseSensitive() function.

Technical Details of CVE-2019-1010239

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The issue involves an improper check for unusual or exceptional conditions in the cJSON library version 1.7.8, leading to a null dereference.

Affected Systems and Versions

Product: cJSON
Vendor: DaveGamble/cJSON
Vulnerable Version: 1.7.8
Fixed Version: 1.7.9 and later

Exploitation Mechanism

The vulnerability can be exploited through a crafted JSON file, targeting the cJSON_GetObjectItemCaseSensitive() function.

Mitigation and Prevention

To address CVE-2019-1010239, users should take immediate steps and implement long-term security practices.

Immediate Steps to Take

Update cJSON library to version 1.7.9 or any subsequent release.

Long-Term Security Practices

Regularly update software and libraries to the latest versions.
Implement secure coding practices to prevent similar vulnerabilities.
Conduct regular security assessments and audits.

Patching and Updates

Ensure that all systems using cJSON are updated to version 1.7.9 or later to mitigate the vulnerability.