Qpopper (aka in.qpopper or popper) 4.0.3 and earlier allows remote attackers to cause a denial of service (CPU consumption) via a very large string, which causes an infinite loop.
http://www.securityfocus.com/bid/4295
http://www.securityfocus.com/archive/1/262213
http://www.iss.net/security_center/static/8458.php
Source: Mitre, NVD
Published: 2002-08-12
Updated: 2008-09-05
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: High