SAP Patches Critical Flaws in Business Client

SAP this week released its April 2018 set of security patches, which include fixes for critical vulnerabilities in web browser controls delivered with SAP Business Client.

A total of 10 Security Notes were included in this month’s Security Patch Day, along with 2 updates to previously released security notes. One of the Notes was rated Hot News, 4 were High Priority, and 7 had a Medium Priority rating, SAP’s advisory reads.

The most important of the Security Notes addresses multiple vulnerabilities in the web browser controls used to display pages in SAP Business Client 6.5 PL5. The vulnerabilities impact browser controls for Microsoft’s Internet Explorer (IE) and the open source Chromium.

“The latter has been determined to show multiple weaknesses like memory corruption, information disclosure and more. Although the SAP note does not explicitly mention it, similar security flaws can be expected for IE,” Onapsis, a firm that specializes in securing Oracle and SAP products, reveals.

Users who follow the Windows update process should be safe from the vulnerabilities in the IE browser control, given that the control “hooks into libraries that are patched alongside other Windows updates,” Onapsis explains.

Delivered with the SAP Business Client, the Chromium browser control requires the newly released security note to patch.

One of the High Priority Security Notes in SAP’s April 2018 patches addresses a denial of service (DoS) in SAP Business One (CVSS score of 7.5), but the bug actually exists in Apache (used as a HTTP server in the Business One service layer). By exploiting the bug, an attacker could terminate the vulnerable application’s process.

SAP also addressed an improper session management issue in SAP Business Objects (CVSS score of 7.3). Tracked as CVE-2018-2408, the vulnerability results in existing user sessions remaining active even after a password change.

This month, SAP also released an update to a Note addressing a code injection vulnerability in SAP Visual Composer (CVSS score of 7.4). The flaw allowed an attacker to inject code into the back-end application by sending a specially crafted HTTP GET request to the Visual Composer. SAP fixed that, but researchers discovered that the bug could be triggered using POST requests as well.

Additionally, SAP released Update 1 to Security Note 2376081. Also featuring a CVSS score of 7.4, the Note patches bugs in VCFRAMEWORK and VC70RUNTIME.

One other update included in this month’s Patch Day is Security Note 2201710. Rated Medium Priority and featuring a CVSS score of 5.4, it is an update to a note released with the September 2015 Patch Day: Fixing Logjam and Alternative chains certificate forgery vulnerabilities in multiple SAP products. 18 SAP products are impacted.

The remaining Security Notes released this month address bugs in SAP CP Connectivity Service and Cloud Connector, Disclosure Management, Solution Manager Incident Management Workcenter, Business One Browser Access, Crystal Reports Server OEM Edition, and Control Center and Cockpit Framework.

SAP also released 4 Security Notes after the second Tuesday of the previous month and before the second Tuesday of this month, for a total of 16 Security Notes, according to ERPscan, another firm specialized in securing Oracle and SAP products.

The resolved issues include 5 implementation flaws, 2 directory traversal, 2 cross-site scripting (XSS), 2 code injection, buffer overflow, missing authorization check, denial of service, XML external entity (XXE), and clickjacking.

Related: SAP Patches Decade-Old Flaws With March 2018 Patches

Related: SAP Resolves High Risk Flaws with February 2018 Patches

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Ionut Arghire is an international correspondent for SecurityWeek.

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