CVE-2017-7696 Explained : Impact and Mitigation

Remote attackers can exploit SAP AS JAVA SSO Authentication Library versions 2.0 through 3.0 to cause a denial of service by using oversized values in the width and height parameters of the otp_logon_ui_resources/qr API. This vulnerability is also known as SAP Security Note 2389042, leading to excessive memory usage.

Understanding CVE-2017-7696

This CVE involves a vulnerability in SAP AS JAVA SSO Authentication Library versions 2.0 through 3.0 that allows remote attackers to perform a denial of service attack.

What is CVE-2017-7696?

CVE-2017-7696 is a security vulnerability in SAP AS JAVA SSO Authentication Library versions 2.0 through 3.0 that enables remote attackers to cause a denial of service by manipulating parameters in a specific API.

The Impact of CVE-2017-7696

The exploitation of this vulnerability can lead to a denial of service condition on the targeted system due to excessive memory consumption.

Technical Details of CVE-2017-7696

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in SAP AS JAVA SSO Authentication Library versions 2.0 through 3.0 allows remote attackers to trigger a denial of service attack by sending large values in specific parameters.

Affected Systems and Versions

Systems running SAP AS JAVA SSO Authentication Library versions 2.0 through 3.0 are vulnerable to this exploit.

Exploitation Mechanism

Attackers exploit this vulnerability by using oversized values in the width and height parameters of the otp_logon_ui_resources/qr API.

Mitigation and Prevention

Protecting systems from CVE-2017-7696 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply relevant security patches provided by SAP to address this vulnerability.
Monitor system resources for any unusual memory consumption that could indicate a potential attack.

Long-Term Security Practices

Regularly update and patch SAP systems to prevent known vulnerabilities from being exploited.
Implement network security measures to restrict unauthorized access to critical APIs and resources.

Patching and Updates

Stay informed about security updates and advisories from SAP to apply patches promptly and ensure system security.