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SAP Resolves 16 Vulnerabilities with September 2017 Patches

SAP on Tuesday released 16 security notes as part of its SAP Security Patch Day, to which it also added 1 out-of-band release and 6 updates to previously released Security Notes, for a total of 23 Notes.

SAP on Tuesday released 16 security notes as part of its SAP Security Patch Day, to which it also added 1 out-of-band release and 6 updates to previously released Security Notes, for a total of 23 Notes.

Three of this month’s Security Notes were rated High severity, 17 were rated Medium risk, and three were assessed with Low impact. The highest CVSS score of the vulnerabilities is 8.1, the German software corporation explains in an advisory.

Impacted products include SAP Point of Sale (POS), SAP NetWeaver, e-Rrecruiting, Adobe Document Services, SAP Netweaver, Web Dynpro ABAP, SAPGUI for HTML, Web Dynpro Java, BIWorkspace, SAP Note Assistant, TREX / BWA, SAP BI mobile application, and SAP ASE Installer, among other.

SAP’s September 2017 patch update also includes 10 Support Package Notes in addition to said 23 SAP Security Patch Day Notes, with 9 of all the patches being updates to previously released Security Notes, ERPScan, a company that specializes in securing SAP and Oracle applications, reveals.

The company also points out that Cross-Site Scripting represented the most common type of addressed vulnerabilities (8 out of 33). Other bug types included: Missing Authorization Check (7), implementation flaws (5), and information disclosure (4). SAP also addressed open redirect, SQL injection, cross-site request forgery, XML external entity, denial of service, hardcoded credentials, and authentication bypass vulnerabilities.

The most important of this month’s patches address vulnerabilities in SAP Point of Sale (POS) Retail Xpress Server. A missing authentication check was initially addressed in July, but the implemented check could be bypassed, so SAP released an out-of-band patch on August 18. The company included the update and new patch in the new Security Patch Day Notes.

One of the addressed bugs was an email verification bypass in SAP E-Recruiting, disclosed by SEC Consult Vulnerability Lab. The researchers discovered that the confirmation link received during the application registration contains parameters representing an incremental user ID and a random value that is not bound to the current registration. Thus, an attacker could guess the user ID and use a known value to register email addresses they didn’t have access to.

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Two of the notes released this month affect a single country each. They address a Cross-Site Request Forgery (CSRF) vulnerability in Electronic Ledger Management for Turkey 1.0 and a Missing Authority Check in a function for Brazilian invoicing features (Electronic Nota Fiscal, NF-e), Onapsis, another company focused on security SAP and Oracle software, points out.

SAP also announced plans to deliver all SAP Notes files with digital signature to improve security. Because the SAP Notes files can get maliciously modified before being delivered to customers, the new feature will ensure increased authenticity and improved security.

“The digitally signed SAP Notes will be available as SAR files. To ensure authenticity of the delivered SAP Notes files, Note Assistant tool (transaction SNOTE) needs to be enabled to upload digitally signed SAP Notes having ABAP corrections,” SAP says.

Customers interested in enabling Note Assistant to upload digitally signed SAP Notes need to implement SAP Security Note 2408073. The note enables digital signature verification feature only for uploading digitally signed SAP Notes. The feature to download the digitally signed notes will be implemented in the coming months.

“SAP Security Response Team hereby also announces that SAP plans to become a CVE Numbering Authority by the end of 2017. Using CVE as a mechanism to disclose patches to vulnerabilities reported by external sources, SAP will facilitate faster patch consumption and transparency for all SAP Customers,” the company also revealed.

Related: SAP Resolves 19 Vulnerabilities With August 2017 Security Notes

Related: SAP Addresses High Severity Vulnerabilities With July 2017 Patches

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

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