UnRTF is a utility to convert files in the Rich Text Format into other formats.
An unchecked strcat() in unrtf may overflow the bounds of a static buffer.
Using a specially crafted file, possibly delivered by e-mail or over the web, an attacker may execute arbitrary code with the permissions of the user running UnRTF.
There is no known workaround at this time.
All unrtf users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-text/unrtf-0.19.3-r1"