abcm2ps is a program to convert abc files to Postscript files.
Multiple vulnerabilities have been discovered in abcm2ps:
A remote attacker could entice a user to load a specially crafted ABC file or use a long -O option on the command line, resulting in the execution of arbitrary code.
There is no known workaround at this time.
All abcm2ps users should upgrade to the latest stable version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-sound/abcm2ps-5.9.13"
NOTE: This is a legacy GLSA. Updates for all affected architectures are available since August 27, 2010. It is likely that your system is already no longer affected by this issue.