RealVNC SMsgReader and CMsgReader denial of service

realvnc-smsgreader-cmsgreader-dos (28515)

Medium Risk

Description:

RealVNC is vulnerable to a denial of service, caused by an integer overflow that can occur when handling clipboard changes. A remote attacker could exploit this vulnerability to cause the server to crash by sending specially-crafted clipboard changes which would cause a heap corruption in the readClientCutText() function of rfb/SMsgReader.cxx or in the readServerCutText() function of rfb/CMsgReader.cxx.

*CVSS:

Base Score:	2.1
Access Vector:	Remote
Access Complexity:	Low
Authentication:	Required
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial
Temporal Score:	1.7
Exploitability:	Unproven
Remediation Level:	Unavailable
Report Confidence:	Uncorroborated

Consequences:

Denial of Service

Remedy:

No remedy available as of July 9, 2011.

References:

• Full-Disclosure Mailing List, Sat Aug 19 2006 - 03:30:56 CDT: RealVNC 4.1.2 minor heap corruption/DoS vulnerability (authentication required).
• RealVNC Web site: RealVNC.
• BID-19599: RealVNC Clipboard Update Integer Overflow Vulnerability

Platforms Affected:

• RealVNC RealVNC 4.1.2 Free

Reported:

Aug 19, 2006

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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