CVE-2019-0349 : Exploit Details and Defense Strategies

The SAP Kernel (ABAP Debugger) includes various versions such as KRNL32NUC 7.21, 7.21EXT, 7.22, 7.22EXT, KRNL32UC 7.21, 7.21EXT, 7.22, 7.22EXT, KRNL64NUC 7.21, 7.21EXT, 7.22, 7.22EXT, 7.49, KRNL64UC 7.21, 7.21EXT, 7.22, 7.22EXT, 7.49, 7.73, KERNEL 7.21, 7.49, 7.53, 7.73, 7.75, 7.76, 7.77. It allows a user to perform the "Go to statement" action without possessing the required authorization S_DEVELOP DEBUG 02, resulting in the occurrence of a Missing Authorization Check.

Understanding CVE-2019-0349

This CVE relates to a vulnerability in SAP Kernel versions that can lead to a Missing Authorization Check.

What is CVE-2019-0349?

CVE-2019-0349 is a security vulnerability in various SAP Kernel versions that allows unauthorized users to execute certain actions without the necessary authorization, leading to a Missing Authorization Check.

The Impact of CVE-2019-0349

The vulnerability can result in unauthorized users bypassing necessary authorization checks, potentially leading to unauthorized access and security breaches within SAP systems.

Technical Details of CVE-2019-0349

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability in SAP Kernel versions allows users to execute the "Go to statement" action without the required authorization S_DEVELOP DEBUG 02, causing a Missing Authorization Check.

Affected Systems and Versions

SAP Kernel (KRNL32NUC): Versions < 7.21, < 7.21EXT, < 7.22, < 7.22EXT
SAP Kernel (KRNL32UC): Versions < 7.21, < 7.21EXT, < 7.22, < 7.22EXT
SAP Kernel (KRNL64NUC): Versions < 7.21, < 7.21EXT, < 7.22, < 7.22EXT, < 7.49
SAP Kernel (KRNL64UC): Versions < 7.21, < 7.21EXT, < 7.22, < 7.22EXT, < 7.49, < 7.73
SAP Kernel (KERNEL): Versions < 7.21, < 7.49, < 7.53, < 7.73, < 7.75, < 7.76, < 7.77

Exploitation Mechanism

The vulnerability allows unauthorized users to execute the "Go to statement" action without possessing the necessary authorization, leading to a Missing Authorization Check.

Mitigation and Prevention

To address CVE-2019-0349, follow these steps:

Immediate Steps to Take

Apply relevant security patches provided by SAP.
Restrict access to vulnerable systems.
Monitor for any unauthorized access attempts.

Long-Term Security Practices

Regularly update SAP systems with the latest security patches.
Implement least privilege access controls.
Conduct security training for users to prevent unauthorized actions.

Patching and Updates

Ensure that all affected SAP Kernel versions are updated with the latest patches to mitigate the vulnerability.