WebConnect 6.5, 6.4.4, and possibly earlier versions allows remote attackers to cause a denial of service (hang) via a URL containing an MS-DOS device name such as (1) AUX, (2) CON, (3) PRN, (4) COM1, or (5) LPT1.
https://exchange.xforce.ibmcloud.com/vulnerabilities/19393
http://www.kb.cert.org/vuls/id/JSHA-69FVMM
http://www.kb.cert.org/vuls/id/552561
http://www.cirt.dk/advisories/cirt-29-advisory.pdf