ISS: Critical Netscape flaw could be widespread
The vulnerability could make Web servers vulnerable to attack
IDG News Service - Security company Internet Security Systems Inc. (ISS) is warning its customers about a critical security hole in a commonly used technology from the Mozilla Foundation called the Netscape Network Security Services (NSS) library that could make Web servers vulnerable to remote attack.
Atlanta-based ISS issued a security bulletin today about a flaw in the NSS library's implementation of the Secure Sockets Layer Version 2 (SSLv2) protocol that could allow remote attackers to use an SSLv2 connection to take control of Web servers using the NSS library. The flaw affects the Netscape Enterprise Server and Sun Microsystems Inc.'s Sun Java System Web Server, but it may also affect countless other products that use the open-source NSS library, ISS said.
The problem stems from a flaw in the way the NSS library handles requests for new SSLv2 sessions. Servers using the NSS library don't check the length of a record field in the first part of the negotiation between two systems attempting to establish an SSLv2 session. Malicious hackers could use the absence of that length check in the first record sent in the negotiation, known as the "hello message," to cause a heap overflow, allowing them to place and run malicious code on a vulnerable server, ISS said.
In heap overflows, an area of a vulnerable computer's memory that's allocated for use by a software program is exceeded by a piece of data that's larger than the allocated space, causing adjacent areas of memory on the system to be overwritten with arbitrary data or malicious code sent by the attacker.
If successfully exploited, the NSS library vulnerability gives a remote attacker access to the vulnerable system with the same level of privileges as those given to the Web server. On Microsoft Windows systems, Web servers typically have full system privileges, ISS said.
While SSLv2 protocol support is disabled on the Netscape Enterprise Server and Java System Web Server, SSLv2 is a commonly used protocol for sending sensitive information over the Internet, and many installations may have the support for SSLv2 enabled, ISS said.
In addition to the Sun Java System Web Server and Netscape Enterprise Server, the flaw affects the Netscape Personalization Engine, Netscape Director Server and Netscape Certificate Management Server, the company said.
The Mozilla Foundation in Mountain View, Calif., issued a patch for the NSS library that fixes the SSLv2 hole. Alternatively, Netscape Enterprise users can disable the SSLv2 protocol, ISS said.
- 15 Non-Certified IT Skills Growing in Demand
- How 19 Tech Titans Target Healthcare
- Twitter Suffering From Growing Pains (and Facebook Comparisons)
- Agile Comes to Data Integration
- Slideshow: 7 security mistakes people make with their mobile device
- iOS vs. Android: Which is more secure?
- 11 sure signs you've been hacked
- The 12 PCI DSS 3.0 requirements addressed by Peer 1 Hosting This handy quick reference outlines the 12 PCI DSS 3.0 requirements, who needs to be compliant and how Alert Logic solutions address the...
- Defense Throughout the Vulnerability Life Cycle This whitepaper provides insight into how to leverage threat and log management technologies to protect your IT assets throughout their vulnerability life cycle.
- Mobile Policy Checklist Here's what to consider when putting together a mobile policy designed to support a highly productive workforce.
- Securing BYOD Mobile computing is becoming so ubiquitous that people no longer bat an eye seeing someone working two devices simultaneously. Individuals and organizations are...
- Live Webcast On-demand webinar: "Mobility Mayhem: Balancing BYOD with Enterprise Security" Check out this on-demand webinar to hear Sophos senior security expert John Shier deep dive into how BYOD impacts your enterprise security strategy...
- Live Webcast Endpoint Backup & Restore: Protect Everyone, Everywhere Arek Sokol from the bleeding-edge IT team at Genentech/Roche explains how he leverages cross-platform enterprise endpoint backup in the public cloud as part...
- Streamline Software Asset Management, Compose a software Management Symphony Keeping track of your organization's software is easy with effective software management solutions from CDW. View the videos in our software solutions channel
- Druva inSync: Endpoint Data Protection & Governance CLICK HERE to watch this video about protecting corporate data on laptops and mobile devices, sponsored by Druva. All Security White Papers | Webcasts