Anti-Virus Scanner Remote Denial Of Service Vulnerability Symantec Norton AntiVirus 2003 Professional Edition Symantec Norton AntiVirus 2002 *not vulnerable Mcafee 7* Mcafee 8* Risk Impact: Medium Remote: yes Description: While having a virus scan [automatic/manual] of some specially crafted compressed files; NAV triggers a DoS using 100% CPU for a very long time. Morover, NAV is unable to stop the scan in middle, even if the user wishes to manually stop the virus scan. Then, in this situation the only alternate is to kill the process. contacted SYMANTEC in any of my advisories since their "security responce team" is too slow to responce any reported incidence. PLEASE: ...test this issue with other AV / trojan scanners as they might also be vulnerable.