OptiPNG is a PNG optimizer that re-compresses image files to a smaller size, without losing any information.
Multiple vulnerabilities have been discovered in OptiPNG. Please review the referenced CVE identifiers for details.
A remote attacker could entice a user to process a specially crafted image file, 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 OptiPNG users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-gfx/optipng-0.7.6-r2"