TightVnc 1.3.9 ClientConnection.cpp CheckBufferSize numeric error

CVSS Meta Temp Score
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CTI Interest Score
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9.0$0-$5k0.00

A vulnerability was found in TightVnc 1.3.9 and classified as critical. Affected by this issue is the function ClientConnection::CheckBufferSize of the file ClientConnection.cpp. The manipulation with an unknown input leads to a numeric error vulnerability. Using CWE to declare the problem leads to CWE-189. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly execute arbitrary code via a large length value in a message, related to the (a) ClientConnection::CheckBufferSize and (b) ClientConnection::CheckFileZipBufferSize functions in ClientConnection.cpp.

The weakness was disclosed 02/04/2009 by Alfredo Ortega with CORE Security Technologies (Website). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-2009-0388 since 02/02/2009. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

A public exploit has been developed by desi in Python and been published 5 days after the advisory. The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 35702 (TightVNC Viewer < 1.3.10 Multiple Integer Overflows), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and running in the context l.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (48466), Tenable (35702) and Exploit-DB (8024).

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: desi
Programming Language: 🔍
Download: 🔍

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Nessus ID: 35702
Nessus Name: TightVNC Viewer < 1.3.10 Multiple Integer Overflows
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 900475
OpenVAS Name: TightVNC ClientConnection Multiple Integer Overflow Vulnerabilities (Linux)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Saint ID: exploit_info/ultravnc_clientconnection_int
Saint Name: UltraVNC ClientConnection integer overflow

Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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Timelineinfo

02/02/2009 🔍
02/03/2009 +1 days 🔍
02/04/2009 +1 days 🔍
02/04/2009 +0 days 🔍
02/04/2009 +0 days 🔍
02/04/2009 +0 days 🔍
02/08/2009 +4 days 🔍
02/09/2009 +1 days 🔍
02/09/2009 +0 days 🔍
02/18/2009 +9 days 🔍
03/17/2015 +2218 days 🔍
08/26/2019 +1623 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: Alfredo Ortega
Organization: CORE Security Technologies
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-0388 (🔍)
X-Force: 48466
Vulnerability Center: 20739 - UltraVNC 1.0.2 and 1.0.5 and TightVnc 1.3.9 Integer Signedness Errors Allow Remote Code Execution, Medium
SecurityFocus: 33568 - Multiple VNC Clients Multiple Integer Overflow Vulnerabilities
Secunia: 33807
OSVDB: 55423 - TightVNC ClientConnection.cpp Multiple Function Integer Signedness Error Remote Code Execution
Vupen: ADV-2009-0321

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/17/2015 16:11
Updated: 08/26/2019 16:12
Changes: 03/17/2015 16:11 (88), 08/26/2019 16:12 (3)
Complete: 🔍

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