Buffer overflow in the SETI@home client 3.03 and other versions allows remote attackers to cause a denial of service (client crash) and execute arbitrary code via a spoofed server response containing a long string followed by a \n (newline) character.
https://exchange.xforce.ibmcloud.com/vulnerabilities/11731
http://www.securityfocus.com/bid/7292
http://www.kb.cert.org/vuls/id/146785
http://lists.grok.org.uk/pipermail/full-disclosure/2003-April/004383.html