Cisco products running IOS and EMC's VMware Workstation were the most critical problem areas this week, but Symantec Norton Security products and HP OpenView products were not far behind. In other words nearly every medium to large computer-using organization in the world has major vulnerabilities to fix this week.
Alan
@RISK is the SANS community's consensus bulletin summarizing the most important vulnerabilities and exploits identified during the past week and providing guidance on appropriate actions to protect your systems (PART I). It also includes a comprehensive list of all new vulnerabilities discovered in the past week (PART II).
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Part I for this issue has been compiled by Rob King at TippingPoint, a division of 3Com, as a by-product of that company's continuous effort to ensure that its intrusion prevention products effectively block exploits using known vulnerabilities. TippingPoint's analysis is complemented by input from a council of security managers from twelve large organizations who confidentially share with SANS the specific actions they have taken to protect their systems. A detailed description of the process may be found at http://www.sans.org/newsletters/cva/#process
Description: Multiple Cisco products contain remotely exploitable vulnerabilities. Cisco products running Cisco's Internetwork Operating System (IOS) contain flaws in their handling of Next Hop Resolution Protocol (NHRP) requests and in the authorization of Secure Copy (SCP) requests. A specially crafted NHRP request could exploit the former vulnerability, and allow an attacker to execute arbitrary code with complete control of the vulnerable system. The vulnerability would allow an attacker with valid credentials to upload or download any file from or to the vulnerable system, including system configuration. Additionally, systems running IOS with voice services enabled and Cisco Unified Communications Manager (UCM) systems, contain flaws in their processing of a variety of voice-related protocols and requests. A malicious Session Initiation Protocol (SIP) request could exploit the vulnerability and allow an anonymous attacker to execute arbitrary code with total control of the vulnerable system. Specially crafted requests in other voice-related protocols could lead to denial-of-service conditions. Some technical details and proofs-of-concept are available for some of these vulnerabilities.
Status: Cisco confirmed, updates available.
Description: VMware Workstation, a popular hardware virtualization system for Intel-architecture based systems, installs "VIELIB.DLL". This library exports several vulnerable ActiveX controls. These ActiveX controls do not properly validate input to several methods that are used to run commands. A web page that instantiates one of these controls could use these methods to execute arbitrary commands with the privileges of the current user. Multiple proofs-of-concept and full technical details are publicly available for these vulnerabilities.
Status: VMware has not confirmed, no updates available. Users can mitigate the impact of these vulnerabilities by disabling the affected controls via Microsoft's "kill bit" mechanism for CLSIDs 7B9C5422-39AA-4C21-BEEF-645E42EB4529 and 0F748FDE-0597-443C-8596-71854C5EA20A.
Description: HP OpenView applications are used for enterprise management and monitoring. These products contain multiple vulnerabilities in several shared components. Failure to properly handle remote input and logging information can result in a buffer overflow. Successfully exploiting these vulnerabilities would allow an attacker to execute arbitrary code with the privileges of the vulnerable component, often root/SYSTEM. Some technical details for these vulnerabilities is publicly available.
Status: HP confirmed, updates available.
Description: The "NACOMUI.DLL" library, installed by several Symantec Norton products, exports two ActiveX controls that contain buffer overflow vulnerabilities. A malicious web page that instantiates one of these controls could exploit these buffer overflows to execute arbitrary code with the privileges of the current user. Some technical details are publicly available for this vulnerability. Note that reusable exploit code, targeting arbitrary ActiveX controls, is widely available and easily adapted to attack these controls.
Status: Symantec confirmed, updates available. Users can mitigate the impact of this vulnerability by disabling the affected controls via Microsoft's "kill bit" mechanism.
Description: Microsoft DirectX is a high-speed media framework for Microsoft Windows. The DirectX System Development Kit (SDK), used to develop software using DirectX, installs an ActiveX control that contains a buffer overflow vulnerability. A malicious web page that instantiates this control could exploit this buffer overflow to execute arbitrary code with the privileges of the current user. Full technical details and a proof-of-concept are publicly available for this vulnerability. Note that this vulnerability affects only the SDK; DirectX runtime installations are otherwise unaffected.
Status: Microsoft has not confirmed, no updates available. Users can mitigate the impact of this vulnerability by disabling the vulnerable control via Microsoft's "kill bit" mechanism for CLSID 201EA564-A6F6-11D1-811D-00C04FB6BD36.
Description: Astaro Security Gateway, a popular security product, contains multiple vulnerabilities. The first vulnerability could allow an attacker to create a denial of service condition; depending on network configuration, this could block all network traffic transiting the device. The second vulnerability could allow an attacker to bypass email scanning services by sending an overlong message. Such messages could contain malware that would avoid detection. Some technical details are publicly available for these vulnerabilities.
Status: Astaro has not confirmed, no updates available.
Description: Asterisk is a popular open source telephony platform. A flaw in the handling of certain requests in the "chan_skinny" component can lead to a denial-of-service condition. Technical details are available for this vulnerability, both in the official advisory, and via source code analysis. Note that an attacker would need authentication to exploit this vulnerability. Note that successfully exploiting this vulnerability could lead to disruption of telephone service, including emergency telephone services.
Status: Asterisk confirmed, updates available.
Description: Cisco Local Director is a network load balancing solution. Systems running HP's HP-UX operating system interface with this service via the HP Controller for Cisco Local Director service, known as "ldconn". If installed, this service listens by default on TCP port 17781. Sending an overly long string to this service will trigger a buffer overflow, and successfully exploiting this overflow would allow an attacker to execute arbitrary code with the privileges of the service (usually root). Because this service is run by the "Internet Super Server" (inetd), it will automatically restart upon termination, allowing essentially unlimited attempts at exploitation. Some technical details for this vulnerability are publicly available.
Status: Vendor confirmed, no updates available. HP has stated that this tool is obsolete and its use should be discontinued. Additionally the version of HP-UX upon which this vulnerability was confirmed is no longer officially supported. It is believed, however, that more recent versions of the operating system are also vulnerable.
This list is compiled by Qualys ( www.qualys.com ) as part of that company's ongoing effort to ensure its vulnerability management web service tests for all known vulnerabilities that can be scanned. As of this week Qualys scans for 5549 unique vulnerabilities. For this special SANS community listing, Qualys also includes vulnerabilities that cannot be scanned remotely.
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