Buffer overflow in the BaseFont writer module in Ghostscript 8.62, and possibly other versions, allows remote attackers to cause a denial of service (ps2pdf crash) and possibly execute arbitrary code via a crafted Postscript file.

Ghostscript included the current working directory in its library search path by default. If a user ran Ghostscript without the "-P-" option in an attacker-controlled directory containing a specially-crafted PostScript library file, it could cause Ghostscript to execute arbitrary PostScript code. With this update, Ghostscript no longer searches the current working directory for library files by default. (CVE-2010-4820)

Note: The fix for CVE-2010-4820 could possibly break existing configurations. To use the previous, vulnerable behavior, run Ghostscript with the "-P" option (to always search the current working directory first).