BidWatcher is a free auction tool for eBay users to keep track of their auctions.
Ulf Harnhammar discovered a format string vulnerability in "netstuff.cpp".
Remote attackers can potentially exploit this vulnerability by sending specially crafted responses via an eBay HTTP server or a man-in-the-middle attack to execute arbitrary malicious code.
There is no known workaround at this time.
All BidWatcher users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/bidwatcher-1.13.17"