Check out the new USENIX Web site.

USENIX Home . About USENIX . Events . membership . Publications . Students
14th USENIX Security Symposium — Abstract

Pp. 287–302 of the Proceedings

OPUS: Online Patches and Updates for Security

Gautam Altekar, Ilya Bagrak, Paul Burstein, Andrew Schultz, University of California, Berkeley


We present OPUS, a tool for dynamic software patching capable of applying fixes to a C program at runtime. OPUS's primary goal is to enable application of security patches to interactive applications that are a frequent target of security exploits. By restricting the type of patches admitted by our system, we are able to significantly reduce any additional burden on the programmer beyond what would normally be required in developing and testing a conventional stop-and-restart patch. We hand-tested 26 real CERT vulnerabilities, of which 22 were dynamically patched with our current OPUS prototype, doing so with negligible runtime overhead and no prior knowledge of the tool's existence on the patch programmer's part.

  • View the full text of this paper in HTML and PDF.
    Click here if you have forgotten your password Until August 2006, you will need your USENIX membership identification in order to access the full papers. The Proceedings are published as a collective work, © 2005 by the USENIX Association. All Rights Reserved. Rights to individual papers remain with the author or the author's employer. Permission is granted for the noncommercial reproduction of the complete work for educational or research purposes. USENIX acknowledges all trademarks within this paper.

  • If you need the latest Adobe Acrobat Reader, you can download it from Adobe's site.
    To become a USENIX Member, please see our Membership Information.

  • ?Need help? Use our Contacts page.

    Last changed: 3 Aug. 2005 ch
    Technical Program
    Security '05 Home
    USENIX home