CVE-2019-14878 : Security Advisory and Response

A vulnerability in the newlib libc library prior to version 3.3.0 can lead to a null pointer dereference bug, impacting the __d2b function.

Understanding CVE-2019-14878

This CVE involves a flaw in the memory allocation process within the newlib libc library.

What is CVE-2019-14878?

The vulnerability lies in the __d2b function of the newlib libc library, where a lack of proper memory allocation check can result in a null pointer dereference bug.

The Impact of CVE-2019-14878

The vulnerability can be exploited to trigger a null pointer dereference bug, potentially leading to a denial of service condition.

Technical Details of CVE-2019-14878

The technical aspects of the vulnerability provide insight into its nature and potential risks.

Vulnerability Description

The __d2b function in the newlib libc library fails to validate successful memory allocation, leading to a null pointer dereference bug.

Affected Systems and Versions

Product: newlib
Vendor: Red Hat
Versions Affected: All newlib versions prior to 3.3.0

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Availability Impact: High

Mitigation and Prevention

Addressing the CVE-2019-14878 vulnerability requires immediate actions and long-term security measures.

Immediate Steps to Take

Update newlib to version 3.3.0 or newer to mitigate the vulnerability.
Monitor for any unusual system behavior that could indicate exploitation.

Long-Term Security Practices

Implement secure coding practices to prevent similar memory-related vulnerabilities.
Regularly update and patch software to address known security issues.

Patching and Updates

Apply patches provided by Red Hat to fix the vulnerability and enhance system security.