mpg123 is a realtime MPEG 1.0/2.0/2.5 audio player for layers 1, 2 and 3.
An issue has been found in mpg123 when decoding specifically crafted MP3 file, that causes a heap-based buffer overflow.
A remote attacker could entice a user to open a specially crafted MPEG file using mpg123, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.
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/mpg123-1.18.1"