PointGuard: Protecting Pointers From Buffer Overflow Vulnerabilities
by Crispin Cowan, Steve Beattie, John Johansen and Perry Wagle - Tuesday, 19 August 2003. - Immunix, Inc.
Despite numerous security technologies crafted to resist buffer overflow vulnerabilities, buffer overflows continue to be the dominant form of software security vulnerability. This is because most buffer overflow defenses provide only partial coverage, and the attacks have adapted to exploit problems that are not well-defended, such as heap overflows. This paper presents PointGuard, a compiler technique to defend against most kinds of buffer overflows by encrypting pointers when stored in memory, and decrypting them only when loaded into CPU registers. We describe the PointGuard implementation, show that PointGuard’s overhead is low when protecting real security-sensitive applications such as OpenSSL, and show that PointGuard is effective in defending against buffer overflow vulnerabilities that are not blocked by previous defenses.

Download the paper in PDF format here.

Spotlight

Banking botnets persist despite takedowns

More than 90 percent of all Trojans targeted financial institutions located in US, followed by the UK, Germany, Italy, Spain and Australia.


Weekly newsletter

Reading our newsletter every Monday will keep you up-to-date with security news.
  



Daily digest

Receive a daily digest of the latest security news.
  
DON'T
MISS

Fri, Apr 24th
    COPYRIGHT 1998-2015 BY HELP NET SECURITY.   // READ OUR PRIVACY POLICY // ABOUT US // ADVERTISE //