[ Kaspersky AV/IS 2010 (avp.exe) Denial-of-Service ] Author: Maksymilian Arciemowicz Date: - - Dis.: 10.07.2009 - - Pub.: 19.08.2009 Risk: Medium Affected Software (tested): - - Kaspersky Internet Security 2010 9.0.0.459 (a) EN - - Kaspersky Anti-Virus 2010 9.0.0.463 DE - --- 0.Description --- Kaspersky Lab is a computer security company, co-founded by Natalia Kasperskaya and Eugene Kaspersky in 1997, offering anti-virus, anti-spyware, anti-spam, and anti-intrusion products. Kaspersky Lab is a privately held company headquartered in Moscow, Russia with regional offices in Germany, France, the Netherlands, the UK, Poland, Romania, Sweden, Japan, China, Korea and the USA. - --- 1. Kaspersky AV/IS 2010 avp.exe Denial of Service --- The main problem exists in parsing url addresses. If we give a lot of dots, kaspersky avp.exe proccess, will get 100% of CPU and will block trafic via browsers. Relativistic time to return to normal behavior is very long. In practice, when we give a large number of dots, kaspesky will not return to normal behavior. This example will denial access to the browser and other kaspersky operations http://lu.cxib.net/.................[ .xY where 1024<Y] It can be exploited remotely by html code. (like: send email) <img src="http://lu.cxib.net/..........................[ more dots ]"> The user who executed the code above, will be deprived of the possibility of browsing and successive reset the kaspersky. Tested on: - - Kaspersky Internet Security 2010 9.0.0.459 (a) (EN) + Windows Vista Enterprise (EN) - - Kaspersky Anti-Virus 2010 9.0.0.463 (DE) + Windows XP Home Edition (DE) 0day (18.08.2009) exploit you can find: http://securityreason.com/downloads/kaspersky.2010.dos.html This script, will generate <img> tags with different url lenght to block kaspersky services. However we can exploit this issue via html email. The method of attack is simple. The victim need only refer to a faulty address. - --- 2. Contact --- Author: Maksymilian Arciemowicz