CVE-2017-16691 Explained : Impact and Mitigation
Learn about CVE-2017-16691 affecting SAP Note Assistant in SAP BASIS versions 7.00 to 7.02, 7.10 to 7.11, 7.30, 7.31, 7.40, and 7.50 to 7.52. Find mitigation steps and prevention measures.
The SAP Note Assistant tool in SAP BASIS versions 7.00 to 7.02, 7.10 to 7.11, 7.30, 7.31, 7.40, and 7.50 to 7.52 is vulnerable to a digital signature verification issue during note file extraction.
Understanding CVE-2017-16691
The vulnerability allows for the extraction of modified files despite failed digital signature verification.
What is CVE-2017-16691?
The SAP Note Assistant tool, available for various SAP BASIS versions, permits the upload of digitally signed note files in SAR format. However, a flaw exists where a modified file can be added to the SAR archive, leading to failed digital signature verification during extraction.
The Impact of CVE-2017-16691
This vulnerability could result in the extraction of unauthorized or malicious files, potentially compromising the integrity of the system and sensitive data.
Technical Details of CVE-2017-16691
The following technical details outline the specifics of the vulnerability:
Vulnerability Description
The issue lies in the digital signature verification process during note file extraction using the SAP Note Assistant tool.
Affected Systems and Versions
- Product: SAP Note Assistant
- Vendor: SAP
- Versions: SAP BASIS from 7.00 to 7.02, from 7.10 to 7.11, 7.30, 7.31, 7.40, from 7.50 to 7.52
Exploitation Mechanism
- Attackers can exploit this vulnerability by adding a modified file to the SAR archive using the SAPCAR tool, bypassing digital signature verification.
Mitigation and Prevention
To address CVE-2017-16691, consider the following mitigation strategies:
Immediate Steps to Take
- Apply the necessary security patches provided by SAP.
- Monitor for any unauthorized file extractions or system modifications.
- Restrict access to the SAP Note Assistant tool to authorized personnel only.
Long-Term Security Practices
- Regularly update and patch SAP BASIS to prevent known vulnerabilities.
- Educate users on secure file handling practices and digital signature verification.
Patching and Updates
- Stay informed about security updates and advisories from SAP.