Citrix Presentation Server up to 9.200 WFICA.OCX SendChannelData heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Citrix Presentation Server up to 9.200 and classified as critical. This vulnerability affects the function SendChannelData of the file WFICA.OCX. Such manipulation leads to heap-based overflow. This vulnerability is referenced as CVE-2006-6334. Furthermore, an exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Citrix Presentation Server up to 9.200 (Connectivity Software). Affected by this issue is the function SendChannelData of the file WFICA.OCX. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. CVE summarizes:

Heap-based buffer overflow in the SendChannelData function in wfica.ocx in Citrix Presentation Server Client before 9.230 for Windows allows remote malicious web sites to execute arbitrary code via a DataSize parameter that is less than the length of the Data buffer.

The bug was discovered 12/04/2006. The weakness was published 12/06/2006 by Andrew Christensen (TippingPoint) with FortConsult (Website). The advisory is shared for download at fortconsult.net. This vulnerability is handled as CVE-2006-6334 since 12/06/2006. 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 Elazar and been published 2 years after the advisory. The exploit is available at fortconsult.net. It is declared as functional. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $25k-$100k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 115925 (Citrix Presentation Server Client WFICA.OCX ActiveX Component Heap Buffer Overflow).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at support.citrix.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at X-Force (30740), Exploit-DB (5106), SecurityFocus (BID 21458†), OSVDB (31789†) and Secunia (SA23246†). computec.ch is providing further details. Similar entry is available at VDB-2550. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.3
VulDB Temp Score: 6.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
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ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Functional
Author: Elazar
Download: 🔍

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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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0-Day Time: 🔍
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Patch: support.citrix.com
Suricata ID: 2007851
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Timelineinfo

12/04/2006 🔍
12/04/2006 +0 days 🔍
12/06/2006 +2 days 🔍
12/06/2006 +0 days 🔍
12/06/2006 +0 days 🔍
12/06/2006 +0 days 🔍
12/06/2006 +0 days 🔍
12/07/2006 +0 days 🔍
12/11/2006 +4 days 🔍
02/12/2008 +428 days 🔍
02/12/2008 +0 days 🔍
09/15/2008 +216 days 🔍
06/15/2025 +6117 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: fortconsult.net
Researcher: Andrew Christensen (TippingPoint)
Organization: FortConsult
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-6334 (🔍)
GCVE (CVE): GCVE-0-2006-6334
GCVE (VulDB): GCVE-100-2720
CERT: 🔍
X-Force: 30740 - Citrix Presentation Server ICA Client ActiveX buffer overflow, High Risk
SecurityFocus: 21458 - Citrix Presentation Server Client WFICA.OCX ActiveX Component Heap Buffer Overflow Vulnerability
Secunia: 23246 - Citrix ICA Client ActiveX Control Buffer Overflow Vulnerability, Highly Critical
OSVDB: 31789 - Citrix Presentation Server Client wfica.ocx ActiveX SendChannelData Function Overflow
SecurityTracker: 1017343
Vulnerability Center: 19454 - Citrix Presentation Server Client < 9.230 Heap-Based Buffer Overflow Allows Remote Code Execution, Medium
Vupen: ADV-2006-4865

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

Created: 12/11/2006 09:47
Updated: 06/15/2025 02:12
Changes: 12/11/2006 09:47 (107), 08/16/2019 20:25 (1), 06/10/2024 23:13 (16), 10/17/2024 03:44 (2), 01/18/2025 12:54 (1), 06/15/2025 02:12 (2)
Complete: 🔍
Cache ID: 216:DF5:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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