mpg123 is a MPEG Audio Player.
Bartlomiej Sieka discovered that mpg123 contains an unsafe strcat() to an array in playlist.c. This code vulnerability may lead to a buffer overflow.
A remote attacker could craft a malicious playlist which, when used, would result in the execution of arbitrary code with the rights of the user running mpg123.
There is no known workaround at this time.
All mpg123 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-sound/mpg123-0.59s-r8"