High Severity
Affected system
Kernel
CVSS
7.7
Component
BC-CST-WDP
Patch Day
2023-07
Released on
2023/07/11
SAP Note
3340735
Workaround
Yes
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Advisory

SAP takes the security of its vast product portfolio very seriously and thus releases security fixes for vulnerabilities reported by external researchers and their customers every second Tuesday of the month.

SAP Note 3340735 was released on 11.07.2023 and deals with "[CVE-2023-35871] Memory Corruption vulnerability in SAP Web Dispatcher" within Kernel. We advice you to follow the instructions, to resolve denial of service (dos) with a high potential for exploitation in component BC-CST-WDP.

According to SAP Security Advisory team a workaround exists. It is advisable to implement the correction as part of maintenance.

Denial of Service (DoS) attacks that take a system offline may lead to significant cost for the company, studies quantify the costs in average between 4 and 5 millions dollars. Business continuity requires SAP systems staying online. The CVSS scores or vulnerability descriptions are not enough to represent how a simple bug can lead to a significant loss for companies.

Risk specification

The SAP Web Dispatcher allows an unauthenticated attacker to cause memory corruption through logical errors in memory management, resulting in a denial of service vulnerability.

Solution

The correction removes the error in the memory management and prevents memory corruption.  Alternativly, the consulting team has proposed the following: "To apply workaround for your specific refer to the instructions in the note.Please assess the workaround applicability for your SAP landscape prior to implementation.Note that this workaround is a temporary fix and is not a permanent solution. SAP strongly recommends you apply the corrections outlined in the security note, which can be done in lieu of the workaround or after the workaround is implemented.". The suggestion may be considered, as a workaround or compensating mitigation. We recommend installing/applying the correction wherever possible and as soon as possible. Base your decision on whether or not to apply the patch on your companies and systems risk perspective and consider the provided CVSS 7.7 score.

 

Disclaimer

SecurityBridge takes the security of SAP products very seriously. We very much encourage the responsible disclosure of security vulnerabilities. If you have detected a vulnerability concerning one of the SAP software products – either in the latest or in a former product version follow the guidelines and processes in accordance with the SAP portal page “Report a Security Vulnerability to SAP”.

The advisories found within the SecurityBridge advisory are generated and continuously enriched by our Team at SecurityBridge and affiliated security consultants, partners, customers of the SecurityBridge Platform, SAP support, and advisory groups.

We do not disclose zero-day vulnerabilities unless a security patch has been made available to the public. In such case, the platform only provides details on which version or signature updates are available within the SecurityBridge platform in order to monitor or measure the vulnerability.

In accordance with SAP guidelines, SecurityBridge only discloses issues where the fixing security note has been released. The vulnerability platform makes no references to available exploits or Proof of Concepts (PoC). Advisories and vulnerabilities will always mention the fixing security note or hints to the corresponding SAP documentation.

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