SAP SQL Anywhere Database Server Stack-based Buffer Overflow Remote Code Execution Vulnerability

May 31st, 2023
ZDI-23-744 ZDI-CAN-17336

CVE ID

CVE-2022-35299

CVSS Score

8.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

SAP

Affected Products

SQL Anywhere

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of SAP SQL Anywhere. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the Database Server, which listens on TCP and UDP ports 2638 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the root.

Additional Details

SAP has issued an update to correct this vulnerability. More details can be found at:
https://d.dam.sap.com/a/3Hat4sC/2022%2012%20Patch%20Day%20Blog%20V9.0.pdf?rc=10

Disclosure Timeline

  • 2022-07-19 - Vulnerability reported to vendor
  • 2023-05-31 - Coordinated public release of advisory

Credit

Maxim Kutyavin (https://github.com/pwnhacker0x18)

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