#ios

Today Microsoft shipped MS14-057 to the .NET Framework in order to resolve an Elevation of Privilege vulnerability in the ClickOnce deployment service. While this update fixes this service, developers using Managed Distributed Component Object Model (a .NET wrapped around DCOM) need to take immediate action to ensure their applications are secure.

It’s that time of year and BlueHat v14 is almost upon us. As always, BlueHat is an opportunity for us to bring the brightest minds in security together, both internal and external, to discuss and tackle some of the hardest problems facing the industry today. Through this conference, our engineering teams get deep technical information and education on the latest threats from proven industry experts.

Today, we are excited to announce the general availability of the Enhanced Mitigation Experience Toolkit (EMET) 5.0. As many of you already know, EMET is a free tool, designed to help customers with their defense in depth strategies against cyberattacks, by helping detect and block exploitation techniques that are commonly used to exploit memory corruption vulnerabilities.

The cdf_check_stream_offset function in cdf.c in file before 5.19, as used in the Fileinfo component in PHP before 5.4.30 and 5.5.x before 5.5.14, relies on incorrect sector-size data, which allows remote attackers to cause a denial of service (application crash) via a crafted stream offset in a CDF file.

As security professionals, we are trained to think in worst-case scenarios. We run through the land of the theoretical, chasing “what if” scenarios as though they are lightning bugs to be gathered and stashed in a glass jar. Most of time, this type of thinking is absolutely the correct thing for security professionals to do.

The Enhanced Mitigation Experience Toolkit, best known as EMET, helps raise the bar against attackers gaining access to computer systems. Since the first release of EMET in 2009, our customers and the security community have adopted EMET and provided us with valuable feedback. Feedback both in forums and through Microsoft Premier Support Services, which provides enterprise support for EMET, has helped shape the new EMET capabilities to further expand the range of scenarios it addresses.

Race condition in the mac80211 subsystem in the Linux kernel before 3.13.7 allows remote attackers to cause a denial of service (system crash) via network traffic that improperly interacts with the WLAN_STA_PS_STA state (aka power-save mode), related to sta_info.c and tx.c.

I’m here at the Moscone Center, San Francisco, California, attending the annual RSA Conference USA 2014. There’s a great crowd here and many valuable discussions. Our Microsoft Security Response Center (MSRC) engineering teams have been working hard on the next version of EMET, which helps customers increase the effort attackers must make to compromise a computer system.

The tcp_rcv_state_process function in net/ipv4/tcp_input.c in the Linux kernel before 3.2.24 allows remote attackers to cause a denial of service (kernel resource consumption) via a flood of SYN+FIN TCP packets, a different vulnerability than CVE-2012-2663.

In our previous posts in this series, we described various mitigation improvements that attempt to prevent the exploitation of specific classes of memory safety vulnerabilities such as those that involve stack corruption, heap corruption, and unsafe list management and reference count mismanagement. These mitigations are typically associated with a specific developer mistake such as writing beyond the bounds of a stack or heap buffer, failing to correctly track reference counts, and so on.