ID

VAR-200707-0453

CVE

CVE-2007-3679

TITLE

Citrix EPA ActiveX Vulnerability in Control Downloading Arbitrary Programs on Client System

DESCRIPTION

The Citrix EPA ActiveX control (aka the "endpoint checking control" or CCAOControl Object) before 4.5.0.0 in npCtxCAO.dll in Citrix Access Gateway Standard Edition before 4.5.5 and Advanced Edition before 4.5 HF1 allows remote attackers to download and execute arbitrary programs onto a client system. Citrix EPA ActiveX control is prone to a remote code-execution vulnerability. An attacker may exploit this issue by enticing victims into visiting a malicious webpage. Successful exploits may allow attackers to execute arbitrary code on a victim's computer. This may facilitate a compromise of vulnerable computers. Citrix Access Gateway, a general-purpose SSL VPN device, provides secure and always-on single-point access support for information resources. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Symantec Vulnerability Research http://www.symantec.com/research Security Advisory Advisory ID: SYMSA-2007-006 Advisory Title: Citrix EPA ActiveX Control Design Flaw Author: Michael White / michael_white@symantec.com Release Date: 19-07-2007 Application: Citrix Access Gateway Platform: Internet Explorer/Win32 Severity: Remote arbitrary code execution Vendor status: Patch available CVE Number: CVE-2007-3679 Reference: http://www.securityfocus.com/bid/24865 Overview: Citrix Access Gateway offers a clientless SSL VPN solution implemented through a series of browser-based controls. As part of the endpoint validation, the ActiveX control for Internet Explorer downloads and executes a series of executable modules from the remote server. Details: Researchers identified that the endpoint checking control can be embedded in any web page and subverted to download and execute any executable module of the attacker\x92s choosing. This vulnerability represents a design flaw in the architecture of the endpoint validation practice. A high level of browser trust is required to allow the endpoint checks to function correctly, and the control is signed by Citrix Corporation. Vendor Response: This has been addressed by a product update. See http://support.citrix.com/article/CTX113815 Recommendation: Apply the product update as detailed in http://support.citrix.com/article/CTX113815 Common Vulnerabilities and Exposures (CVE) Information: The Common Vulnerabilities and Exposures (CVE) project has assigned the following names to these issues. These are candidates for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. CVE-2007-3679 - -------Symantec Vulnerability Research Advisory Information------- For questions about this advisory, or to report an error: research@symantec.com For details on Symantec's Vulnerability Reporting Policy: http://www.symantec.com/research/Symantec-Responsible-Disclosure.pdf Symantec Vulnerability Research Advisory Archive: http://www.symantec.com/research/ Symantec Vulnerability Research GPG Key: http://www.symantec.com/research/Symantec_Vulnerability_Research_GPG.asc - -------------Symantec Product Advisory Information------------- To Report a Security Vulnerability in a Symantec Product: secure@symantec.com For general information on Symantec's Product Vulnerability reporting and response: http://www.symantec.com/security/ Symantec Product Advisory Archive: http://www.symantec.com/avcenter/security/SymantecAdvisories.html Symantec Product Advisory PGP Key: http://www.symantec.com/security/Symantec-Vulnerability-Management-Key.asc - --------------------------------------------------------------- Copyright (c) 2007 by Symantec Corp. Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Consulting Services. Reprinting the whole or part of this alert in any medium other than electronically requires permission from research@symantec.com. Disclaimer The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information. Symantec, Symantec products, and Symantec Consulting Services are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (MingW32) iD8DBQFGnRXXuk7IIFI45IARAla8AKDKwcYD23htC+trwq1Ke5Qvam99YACfUgJh VynDvAnppLmojz2wbrLfR+U= =QakL -----END PGP SIGNATURE----- . ---------------------------------------------------------------------- Try a new way to discover vulnerabilities that ALREADY EXIST in your IT infrastructure. The Full Featured Secunia Network Software Inspector (NSI) is now available: http://secunia.com/network_software_inspector/ The Secunia NSI enables you to INSPECT, DISCOVER, and DOCUMENT vulnerabilities in more than 4,000 different Windows applications. ---------------------------------------------------------------------- TITLE: Citrix Access Gateway Multiple Vulnerabilities SECUNIA ADVISORY ID: SA26143 VERIFY ADVISORY: http://secunia.com/advisories/26143/ CRITICAL: Highly critical IMPACT: Cross Site Scripting, Exposure of sensitive information, System access WHERE: >From remote SOFTWARE: Citrix Access Gateway 4.x http://secunia.com/product/6168/ DESCRIPTION: Some vulnerabilities and a security issue have been reported in Citrix Access Gateway, which can be exploited by malicious people to disclose sensitive information, conduct cross-site request forgery attacks, or to compromise a user's system. 1) A security issue due to residual information left on the client device can be exploited to gain unauthorized access to a user\x92s active session. This security issue is reported in Access Gateway Advanced Edition 4.5 and prior. These vulnerabilities are reported in Access Gateway Standard Edition 4.5.2 and prior and Access Gateway Advanced Editions version 4.5 and prior with appliance firmware 4.5.2 and prior. 3) The web-based administration console of an Access Gateway appliance allows administrator to perform certain actions via HTTP requests without performing any validity checks to verify the request. This can be exploited to e.g. change certain configuration settings, by enticing a logged-in administrator to visit a malicious web site. This vulnerability is reported in Access Gateway model 2000 appliances with firmware version 4.5.2 and prior. Access Gateway Enterprise Edition is reportedly not affected. A redirection issue that may facilitate phishing attacks has also been reported. SOLUTION: Apply hotfix and update firmware to version 4.5.5. 2) The vendor credits Michael White, Symantec. 3) The vendor credits Paul Johnston. ORIGINAL ADVISORY: http://support.citrix.com/article/CTX113814 http://support.citrix.com/article/CTX113815 http://support.citrix.com/article/CTX113816 http://support.citrix.com/article/CTX113817 ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

Design Error

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Michael White※ michael_white@symantec.com

SOURCES

LAST UPDATE DATE

2025-04-10T23:13:15.655000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE