CVE-2007-4013 in Firefox
Summary
by MITRE
Multiple unspecified vulnerabilities in (1) Net6Helper.DLL (aka Net6Launcher Class) 4.5.2 and earlier, (2) npCtxCAO.dll (aka Citrix Endpoint Analysis Client) in a Firefox plugin directory, and (3) a second npCtxCAO.dll (aka CCAOControl Object) before 4.5.0.0 in Citrix Access Gateway Standard Edition before 4.5.5 and Advanced Edition before 4.5 HF1 have unknown impact and attack vectors, possibly related to buffer overflows. NOTE: vector 3 might overlap CVE-2007-3679.
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Analysis
by VulDB Data Team • 07/23/2019
The vulnerability described in CVE-2007-4013 represents a collection of unspecified security flaws affecting multiple components within Citrix Access Gateway products and related browser plugins. These vulnerabilities were discovered in Net6Helper.DLL, which is part of the Net6Launcher Class version 4.5.2 and earlier, along with two instances of npCtxCAO.dll that appear in Firefox plugin directories. The affected Citrix products include the Standard Edition before version 4.5.5 and the Advanced Edition before version 4.5 HF1, with the second npCtxCAO.dll component specifically impacting versions prior to 4.5.0.0. The unspecified nature of these vulnerabilities suggests that they may involve multiple attack surfaces and could potentially be exploited through various vectors, making them particularly concerning from a security perspective. The potential for buffer overflow conditions in these components aligns with common exploitation patterns in software security, where improper memory management can lead to arbitrary code execution or system compromise.
The technical nature of these vulnerabilities is particularly concerning as they involve browser plugin components that execute within the context of web browsers, creating potential attack vectors that could be leveraged through malicious web content or social engineering techniques. The presence of multiple instances of the same component name npCtxCAO.dll in different contexts suggests either a complex software architecture or potential confusion in vulnerability reporting, with the third vector potentially overlapping with CVE-2007-3679, indicating that these issues may be part of a broader class of vulnerabilities affecting Citrix's browser plugin implementations. The buffer overflow conditions that may be present in these components typically arise from insufficient bounds checking when processing user-supplied data, allowing attackers to overwrite adjacent memory locations and potentially execute malicious code with the privileges of the affected browser process.
The operational impact of these vulnerabilities extends beyond simple exploitation potential to encompass broader security implications for organizations relying on Citrix Access Gateway solutions. Attackers who successfully exploit these vulnerabilities could gain unauthorized access to network resources, potentially leading to data breaches, system compromise, or lateral movement within network environments. The fact that these vulnerabilities affect browser plugins means that attacks could be delivered through standard web browsing activities, making them particularly difficult to defend against and potentially affecting a wide range of users. Organizations using affected Citrix products would face significant security risks, as these vulnerabilities could be exploited by remote attackers without requiring local system access or authentication, potentially enabling complete compromise of network access gateways. The overlapping nature with CVE-2007-3679 suggests that these vulnerabilities may represent a family of related issues affecting Citrix's browser plugin architecture.
Mitigation strategies for these vulnerabilities should focus on immediate patching of affected Citrix Access Gateway products to versions that address the identified security flaws. Organizations should implement network segmentation and monitoring to detect potential exploitation attempts, particularly focusing on unusual network traffic patterns or attempts to access the affected components. Browser security configurations should be reviewed to minimize the impact of potentially compromised plugins, including disabling unnecessary browser plugins and implementing strict content security policies. The vulnerabilities align with common ATT&CK tactics such as T1203 (Exploitation for Client Execution) and T1071.004 (Application Layer Protocol: DNS) when considering the potential attack vectors through web browsers. Security teams should also consider implementing web application firewalls and monitoring for indicators of compromise related to these specific components, while ensuring that all systems are updated to prevent exploitation through buffer overflow conditions that could lead to privilege escalation or complete system compromise. Compliance with industry standards such as those outlined in CWE categories related to buffer overflows and input validation would be essential in preventing similar vulnerabilities from arising in future implementations.