Secunia Research has discovered a vulnerability in SAP GUI, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to a boundary error in the included TabOne ActiveX control (sizerone.ocx) when copying tab captions. This can be exploited to cause a heap-based buffer overflow by e.g. adding multiple tabs via the "AddTab()" method.
Successful exploitation may allow execution of arbitrary code.
The vulnerability is confirmed in SAP GUI 6.40 Patch 29 and SAP GUI 7.10 including sizerone.ocx version 22.214.171.124. Other versions may also be affected.
Solution: Update to the latest 7.10 PL, which sets the kill-bit for the ActiveX control.
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Subject: SAP GUI TabOne ActiveX Control Caption List Buffer Overflow
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