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

Summaryinfo

A vulnerability categorized as critical has been discovered in TightVnc 1.3.9. This issue affects the function ClientConnection::CheckBufferSize of the file ClientConnection.cpp. Such manipulation leads to numeric error. This vulnerability is uniquely identified as CVE-2009-0388. Moreover, an exploit is present. It is advisable to upgrade the affected component.

Detailsinfo

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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 116181 (Multiple VNC Clients Multiple Integer Overflow Vulnerabilities).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (48466), Exploit-DB (8024), Tenable (35702), SecurityFocus (BID 33568†) and OSVDB (55423†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

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

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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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

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍
McAfee IPS Version: 🔍

Fortigate IPS: 🔍

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 🔍
05/15/2025 +3712 days 🔍

Sourcesinfo

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

CVE: CVE-2009-0388 (🔍)
GCVE (CVE): GCVE-0-2009-0388
GCVE (VulDB): GCVE-100-46292
X-Force: 48466
SecurityFocus: 33568 - Multiple VNC Clients Multiple Integer Overflow Vulnerabilities
Secunia: 33807
OSVDB: 55423 - TightVNC ClientConnection.cpp Multiple Function Integer Signedness Error Remote Code Execution
Vulnerability Center: 20739 - UltraVNC 1.0.2 and 1.0.5 and TightVnc 1.3.9 Integer Signedness Errors Allow Remote Code Execution, Medium
Vupen: ADV-2009-0321

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

Entryinfo

Created: 03/17/2015 16:11
Updated: 05/15/2025 17:28
Changes: 03/17/2015 16:11 (88), 08/26/2019 16:12 (3), 11/23/2024 19:48 (17), 05/15/2025 17:28 (2)
Complete: 🔍
Cache ID: 216::103

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