Re: Invalid memory access with XML profiles

> i.e., here p may be not 0-terminated. However, NewXmlTree() calls
> strlen() on its argument. This is a bug.

Which version of ImageMagick are you using?  The latest release accounts for
the problem you reported by using StringInfoToString():

  profile=GetImageProfile(image,"xmp");
  if (profile == (StringInfo *) NULL)
    return(MagickFalse);
  if ((property == (const char *) NULL) || (*property == '\0'))
    return(MagickFalse);
  xmp_profile=StringInfoToString(profile);
  if (xmp_profile == (char *) NULL)
    return(MagickFalse);
  for (p=xmp_profile; *p != '\0'; p++)
    if ((*p == '<') && (*(p+1) == 'x'))
      break;
  exception=AcquireExceptionInfo();
  xmp=NewXMLTree((char *) p,exception);