Info-ZIP UnZip 5.42 and earlier allows attackers to overwrite arbitrary files during archive extraction via filenames in the archive that begin with the '/' (slash) character.
http://www.info-zip.org/pub/infozip/UnZip.html
http://sunsolve.sun.com/search/document.do?assetkey=1-77-1000928.1-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-47800-1