The MITRE CVE dictionary describes this issue as:
Multiple integer underflows in the icmLut_allocate function in International Color Consortium (ICC) Format library (icclib), as used in Ghostscript 9.06 and Argyll Color Management System, allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted (1) PostScript or (2) PDF file with embedded images, which triggers a heap-based buffer overflow. NOTE: this issue is also described as an array index error.
Find out more about CVE-2012-4405 from the
MITRE CVE dictionary dictionary and