Antivirus security: naked during updates
Article first published online: 22 APR 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Software: Practice and Experience
Volume 44, Issue 10, pages 1201–1222, October 2014
How to Cite
2014), Antivirus security: naked during updates, Softw. Pract. Exper., 44, pages 1201–1222, doi: 10.1002/spe.2197, , and (
- Issue published online: 6 SEP 2014
- Article first published online: 22 APR 2013
- Manuscript Accepted: 22 MAR 2013
- Manuscript Revised: 3 FEB 2013
- Manuscript Received: 1 NOV 2012
- code execution;
- local privilege escalation;
- denial of service
The security of modern computer systems heavily depends on security tools, especially on antivirus software solutions. In the anti-malware research community, development of techniques for evading detection by antivirus software is an active research area. This has led to malware that can bypass or subvert antivirus software. The common strategies deployed include the use of obfuscated code and staged malware whose first instance (usually installer such as dropper and downloader) is not detected by the antivirus software. Increasingly, most of the modern malware are staged ones in order for them to be not detected by antivirus solutions at the early stage of intrusion. The installers then determine the method for further intrusion including antivirus bypassing techniques. Some malware target boot and/or shutdown time when antivirus software may be inactive so that they can perform their malicious activities. However, there can be another time frame where antivirus solutions may be inactive, namely, during the time of update. All antivirus software share a unique characteristic that they must be updated at a very high frequency to provide up-to-date protection of their system. In this paper, we suggest a novel attack vector that targets antivirus updates and show practical examples of how a system and antivirus software itself can be compromised during the update of antivirus software. Local privilege escalation using this vulnerability is also described. We have investigated this design vulnerability with several of the major antivirus software products such as Avira, AVG, McAfee, Microsoft, and Symantec and found that they are vulnerable to this new attack vector. The paper also discusses possible solutions that can be used to mitigate the attack in the existing versions of the antivirus software as well as in the future ones. Copyright © 2013 John Wiley & Sons, Ltd.