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TITLE:
SignKorea SKCommAX ActiveX Control "DownloadCertificateExt()" Buffer
Overflow

SECUNIA ADVISORY ID:
SA24587

VERIFY ADVISORY:
http://secunia.com/advisories/24587/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
SignKorea SKCommAX ActiveX Control 6.x
http://secunia.com/product/13781/
SignKorea SKCommAX ActiveX Control 7.x
http://secunia.com/product/13780/

DESCRIPTION:
Park Gyu Tae has reported a vulnerability in SignKorea's SKCommAX
ActiveX control, which can be exploited by malicious people to
compromise a user's system.

The vulnerability is caused due to a boundary error within the
"DownloadCertificateExt()" method. This can be exploited to cause a
buffer overflow via an overly long string passed as the pszUserID
argument of the method.

Successful exploitation may allow arbitrary code execution but
requires that the user is e.g. tricked into visiting a malicious
website.

The vulnerability is reported in versions 7.2.0.2 and 6.6.0.1. Other
versions may also be affected.

SOLUTION:
Update to the latest version.

PROVIDED AND/OR DISCOVERED BY:
Park Gyu Tae

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About:
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